# 9000 (number)

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Cardinal | nine thousand | |||

Ordinal |
9000th (nine thousandth) | |||

Factorization |
2^{3}× 3^{2}× 5^{3} | |||

Greek numeral | ,Θ´ | |||

Roman numeral | VMMMM, MX, or IX | |||

Unicode symbol(s) | MX, mx, IX, ix | |||

Binary |
10001100101000_{2} | |||

Ternary |
110100100_{3} | |||

Quaternary |
2030220_{4} | |||

Quinary |
242000_{5} | |||

Senary |
105400_{6} | |||

Octal |
21450_{8} | |||

Duodecimal |
5260_{12} | |||

Hexadecimal |
2328_{16} | |||

Vigesimal |
12A0_{20} | |||

Base 36 |
6Y0_{36} |

**9000** (**nine thousand**) is the natural number following 8999 and preceding 9001.

## Contents

## In other fields[edit]

- ISO 9000 is the ISO's standard for Quality Management System in production environments. This includes ISO 9001–9004.

## Selected numbers in the range 9001–9999[edit]

### 9001 to 9099[edit]

**9009**– centered cube number^{[1]}**9025**– 95^{2}, centered octagonal number**9029**– Sophie Germain prime**9041**– super-prime**9045**– triangular number**9059**– Sophie Germain prime**9072**– decagonal number**9077**– Markov number^{[2]}**9091**– unique prime^{[3]}

### 9100 to 9199[edit]

**9103**– super-prime**9126**– pentagonal pyramidal number^{[4]}**9139**– tetrahedral number^{[5]}**9180**– triangular number

### 9200 to 9299[edit]

**9216**– 96^{2}**9221**– Sophie Germain prime**9224**– octahedral number^{[6]}**9241**– cuban prime of the form*x*=*y*+ 1^{[7]}**9261**- 21^{3}, largest 4 digit perfect cube**9272**– weird number^{[8]}**9283**– centered heptagonal number**9293**– Sophie Germain prime, super-prime

### 9300 to 9399[edit]

**9316**– triangular number**9319**– super-prime**9334**– nonagonal number**9349**– Lucas prime^{[9]}, Fibonacci number**9371**– Sophie Germain prime**9397**– balanced prime

### 9400 to 9499[edit]

**9403**– super-prime**9409**– 97^{2}, centered octagonal number**9419**– Sophie Germain prime**9439**– completes a prime quadruplet set**9453**– triangular number**9455**– square pyramidal number^{[10]}**9457**– decagonal number**9461**– super-prime, twin prime**9467**– safe prime**9473**– Sophie Germain prime, balanced prime, Proth prime**9479**– Sophie Germain prime

### 9500 to 9599[edit]

**9539**– Sophie Germain prime, super-prime**9551**– first prime followed by 35 consecutive composite numbers**9587**– safe prime, follows 35 consecutive composite numbers**9591**– triangular number

### 9600 to 9699[edit]

**9601**– Proth prime**9604**– 98^{2}**9619**– super-prime**9629**– Sophie Germain prime**9647**– centered heptagonal number**9660**– ISO 9660 standard for CD-ROM file system**9661**– super-prime, sum of nine consecutive primes (1049 + 1051 + 1061 + 1063 + 1069 + 1087 + 1091 + 1093 + 1097)**9689**– Sophie Germain prime**9699**– nonagonal number

### 9700 to 9799[edit]

**9721**– prime of the form 2p-1**9730**– triangular number**9739**– super-prime**9743**– safe prime**9791**– Sophie Germain prime

### 9800 to 9899[edit]

**9800**– member of a Ruth-Aaron pair (first definition) with 9801**9801**– 99^{2}, centered octagonal number, member of a Ruth-Aaron pair (first definition) with 9800**9833**– super-prime**9839**– safe prime**9850**– decagonal number**9855**– magic constant of*n*×*n*normal magic square and n-Queens Problem for*n*= 27.**9857**– Proth prime**9859**– super-prime**9870**– triangular number**9871**– balanced prime**9880**– tetrahedral number^{[5]}**9887**– safe prime**9899**– ISO 9899 standard for C programming language

### 9900 to 9999[edit]

**9901**– unique prime, sum of seven consecutive primes (1381 + 1399 + 1409 + 1423 + 1427 + 1429 + 1433)^{[3]}**9923**– super-prime, probably smallest certainly executable prime number on x86 MS-DOS^{[11]}**9949**– sum of nine consecutive primes (1087 + 1091 + 1093 + 1097 + 1103 + 1109 + 1117 + 1123 + 1129)**9973**– super-prime, largest four-digit prime**9999**– Kaprekar number, Repdigit

## References[edit]

**^**"Sloane's A005898 : Centered cube numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^**"Sloane's A002559 : Markoff (or Markov) numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.- ^
^{a}^{b}"Sloane's A040017 : Unique period primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14. **^**"Sloane's A002411 : Pentagonal pyramidal numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.- ^
^{a}^{b}"Sloane's A000292 : Tetrahedral numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14. **^**"Sloane's A005900 : Octahedral numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^**"Sloane's A002407 : Cuban primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^**"Sloane's A006037 : Weird numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^**"Sloane's A005479 : Prime Lucas numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^**"Sloane's A000330 : Square pyramidal numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-06-14.**^***An Executable Prime Number?*, archived from the original on 2010-02-10