173 (number)

From Wikipedia, the free encyclopedia
← 172 173 174 →
← 170 171 172 173 174 175 176 177 178 179 →
List of numbers — Integers
← 0 100 200 300 400 500 600 700 800 900 →
Cardinalone hundred seventy-three
Ordinal173rd
(one hundred seventy-third)
Factorizationprime
Prime40th
Divisors1, 173
Greek numeralΡΟΓ´
Roman numeralCLXXIII
Binary101011012
Ternary201023
Octal2558
Duodecimal12512
HexadecimalAD16

173 (one hundred [and] seventy-three) is the natural number following 172 and preceding 174.

In mathematics[]

173 is:

  • an odd number.
  • a deficient number.
  • an odious number.
  • a balanced prime.[1]
  • an Eisenstein prime with no imaginary part.
  • a Sophie Germain prime.[2]
  • an inconsummate number.[3]
  • the sum of 2 squares: 22 + 132.
  • the sum of three consecutive prime numbers: 53 + 59 + 61.
  • palindromic in bases 3 (201023), 9 (2129) and 172 (11172).

In astronomy[]

  • 173 Ino is a large dark main belt asteroid
  • 173P/Mueller is a periodic comet in the Solar System
  • (VV 296, KPG 439) is a pair of galaxies in the constellation Boötes

In the military[]

  • 173rd Air Refueling Squadron unit of the Nebraska Air National Guard
  • 173rd Airborne Brigade Combat Team of the United States Army based in Vicenza
  • 173rd Battalion unit of the Canadian Expeditionary Force during the World War I
  • 173rd Surveillance Squadron (Australia) of the Australian Army at Oakey, Queensland
  • K-173 Chelyabinsk Russian Oscar-class submarine
  • USNS Provo (T-AG-173) was a U.S. Navy Phoenix-class auxiliary ship following World War II
  • USS Codington (AK-173) was a U.S. Navy cargo ship during World War II
  • USS Eldridge (DE-173) was a U.S. Navy Cannon-class destroyer escort during World War II
  • USS Etamin (IX-173) was a U.S. Navy Crater-class cargo ship during World War II
  • USS Florence (SP-173) was a U.S. Navy yacht during World War I
  • USS Hyde (APA-173) was a U.S. Navy Haskell-class attack transport ship during World War II
  • USS PC-472 was a 173-foot (53 m) U.S. Navy submarine chaser during World War II
  • USS Pike (SS-173) was a U.S. Navy Porpoise-class submarine during World War II
  • USS Sproston (DD-173) was a U.S. Navy Wickes-class destroyer following World War II
  • Vought V-173 (Flying Pancake) was a U.S. Navy experimental test aircraft during World War II

In transportation[]

  • The Georgia Railroad, the world longest railroad in 1845, ran for 173 miles (278 km) from Augusta to Marthasville (Atlanta, Georgia)
  • United Airlines Flight 173 en route from Denver to Portland crashed on December 28, 1978
  • The Velocity 173 was a kit aircraft produced by Velocity Aircraft in the early '90s.

In popular culture[]

In other fields[]

173 is also:

  • The year AD 173 or 173 BC
  • 173 AH is a year in the Islamic calendar that corresponds to 789 – 790 CE
  • The atomic number of an element temporarily called Unsepttrium
  • Topic of discussion during the podcast "Skeptics with a K" episode 180 [4]

See also[]

External links[]

References[]

  1. ^ "Sloane's A006562 : Balanced primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.
  2. ^ "Sloane's A005384 : Sophie Germain primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.
  3. ^ "Sloane's A003635 : Inconsummate numbers in base 10". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.
  4. ^ Michael Marshall (August 25, 2016). "Skeptics with a K: Episode #180". www.merseysideskeptics.org.uk/podcasts/ (Podcast). Merseyside Skeptics Society. Event occurs at 0:59:15-1:01:30. Retrieved 15 November 2016.
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