# 9000 (number)

 ← 8999 9000 9001 →
Cardinal nine thousand
Ordinal 9000th
(nine thousandth)
Factorization 23× 32× 53
Greek numeral ,Θ´
Roman numeral VMMMM, MX, or IX
Unicode symbol(s) MX, mx, IX, ix
Binary 100011001010002
Ternary 1101001003
Quaternary 20302204
Quinary 2420005
Senary 1054006
Octal 214508
Duodecimal 526012
Vigesimal 12A020
Base 36 6Y036

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

## In other fields

• 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

### 9500 to 9599

• 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

• 9601Proth prime
• 9604982
• 9619super-prime
• 9629 – Sophie Germain prime
• 9647 – centered heptagonal number
• 9660 – ISO 9660 standard for CD-ROM file system
• 9661super-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

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

## References

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