# 193 (number)

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Cardinal | one hundred ninety-three | |||

Ordinal |
193rd (one hundred ninety-third) | |||

Factorization | prime | |||

Prime | 44th | |||

Divisors | 1, 193 | |||

Greek numeral | ΡϞΓ´ | |||

Roman numeral | CXCIII | |||

Binary |
11000001_{2} | |||

Ternary |
21011_{3} | |||

Quaternary |
3001_{4} | |||

Quinary |
1233_{5} | |||

Senary |
521_{6} | |||

Octal |
301_{8} | |||

Duodecimal |
141_{12} | |||

Hexadecimal |
C1_{16} | |||

Vigesimal |
9D_{20} | |||

Base 36 |
5D_{36} |

**193** (**one hundred [and] ninety-three**) is the natural number following 192 and preceding 194.

## Contents

## In mathematics[edit]

- 193 is an odd number
- 193 is a centered 32-gonal number
- 193 is a happy number
- 193 is a lucky number
- 193 is an odious number
- 193 is a square-free number
- 193 is the sum of 2 square numbers: 12
^{2}+ 7^{2}(or 144 + 49) - 193 is the difference of 2 square numbers: 97
^{2}- 96^{2}(or 9409 - 9216) - 193 is a prime number
- 193 is a Cuban prime
- 193 is a full reptend prime
- 193 is a Pierpont prime
^{[1]} - 193 is a Pillai prime
^{[2]} - 193 is a Proth prime, as it is 3 × 2
^{6}+ 1 - 193 is a twin prime with 191
- 193 is the only odd prime
*p*known for which 2 is not a primitive root of .^{[3]}

- 193 can be written as the difference between the product and the sum of the first four primes
- 193 is a twin number
- 193/71 is the most accurate approximation of Euler's Number (e) such that both the numerator and the denominator are integers less than 200 (approx. 99.99897% accurate)

## In geography[edit]

- Eyebrow No. 193 is a rural municipality in Saskatchewan, Canada
- House at 193 Vernon Street, a historic house at 193 Vernon Street in Wakefield, Massachusetts

## In the military[edit]

- 193 Squadron Israeli Air Force AS565 Panther helicopter squadron
- 193rd Special Operations Wing assigned to the Pennsylvania Air National Guard, the parent unit of the 193rd Special Operations Squadron
- 193rd Battalion unit in the Canadian Expeditionary Force during World War I
- 193rd Infantry Brigade United States Army Reserve during World War II
- Bristol Type 193 Belvedere was a Royal Air Force twin-engined, tandem rotor military helicopter during the 1960
- No. 193 Squadron was a Royal Air Force squadron during World War II
- USA 193 is an American military spy satellite launched on December 14, 2006
- USNS
*Glomar Explorer*(T-AG-193) United States Navy vessel used for deep-sea drilling - USNS
*Walter S. Diehl*(T-AO-193) is a United States Navy*Henry J. Kaiser*-class oiler - USS
*Abel P. Upshur*(DD-193) was a United States Navy*Clemson*-class destroyer until World War II - USS
*Garfield Thomas*(DE-193) was a United States Navy*Cannon*-class destroyer escort during World War II - USS
*Jacana*(AMS-193) was a United States Navy*Falcon*-class motor minesweeper from 1954–1976 - USS
*Lancaster*(AK-193) was a United States Navy*Alamosa*-class cargo ship during World War II - USS
*Sanborn*(APA-193) was a United States Navy*Haskell*-class attack transport during World War II - USS
*Swordfish*(SS-193) was a United States Navy*Sargo*-class submarine during World War II

## In sports[edit]

- Jordan 193 Formula One car, which Jordan Grand Prix raced in the 1993 Formula One season

## In telephony[edit]

- 193 is the fire emergency number in Brazil
- 193 is the medical emergency number in Ghana
- 193 is the fire emergency number in the Republic of Macedonia, Croatia, Serbia, Kosovo
- 193 is the medical emergency number for the National Guard in Tunisia

## In transportation[edit]

- National Airlines Flight 193 crashed into Escambia Bay by Pensacola International Airport on May 8, 1978

## In other fields[edit]

** 193** is also:

- The year AD 193 or 193 BC
- The atomic number of an element temporarily called Unenntrium
- 193 Ambrosia is a main belt asteroid
- Minuscule 193 is a Greek minuscule manuscript of the New Testament, on parchment
- ICRF 193 is a topoisomerase inhibitor
- Trial of the 193 was a series of criminal trials in Russia in 1877–1878

## See also[edit]

- CIIC 193
- List of highways numbered 193
- United Nations Security Council Resolution 193
- United States Supreme Court cases, Volume 193
- Pennsylvania House of Representatives, District 193
- P.S. 193, Brooklyn, New York

## External links[edit]

Wikimedia Commons has media related to .193 (number) |

- Number Facts and Trivia: 193
- The Number 193
- Number Gossip: 193
- The Positive Integer 193
- Virtue Science: 193

## References[edit]

**^**"Sloane's A005109 : Class 1- (or Pierpont) primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-28.**^**"Sloane's A063980 : Pillai primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-28.**^**E. Friedman, "What's Special About This Number" Accessed 2 January 2006 and again 15 August 2007.