193 (number)

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
• 193 is the difference of 2 square numbers: 97² - 96²
• 193 is a prime number
• * 193 is a Cuban prime
• * 193 is a full reptend prime
• * 193 is a Pierpont prime
• * 193 is a Pillai prime
• * 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.
• 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 such that both the numerator and the denominator are integers less than 200

  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
• United States Navy vessel used for deep-sea drilling
• is a United States Navy
• was a United States Navy until World War II
• was a United States Navy during World War II
• was a United States Navy Falcon-class motor minesweeper from 1954–1976
• was a United States Navy Alamosa-class cargo ship during World War II
• was a United States Navy during World War II
• was a United States Navy 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

• The year AD 193 or 193 BC
• The atomic number of an element temporarily called
• 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