193 (number)

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

In mathematics[]

• 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: 12² + 7² (or 144 + 49)
• 193 is the difference of 2 square numbers: 97² - 96² (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 × 2⁶ + 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 ${\displaystyle 4p^{2}+1}$.^[3]
• 193 can be written as the difference between the product and the sum of the first four primes
• 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[]

• 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[]

• 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) was a 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 replenishment 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 to 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 transportation[]

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

In other fields[]

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
• the number of members of the United Nations
• 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[]

• 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[]

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[]