189 (number)

189 (one hundred [and] eighty-nine) is the natural number following 188 and preceding 190.

In mathematics
189 is:
an odd number
a centered cube number
a composite number
a deficient number, as 131 is less than 189
a heptagonal number
a lucky number
a Ulam number
a 64-gonal number
a Kaprekar constant in base 2
palindromic in bases 2 (101111012), 20 (9920), 26 (7726) and 62 (3362).
a Harshad number in bases 3, 4, 5, 6, 7, 11, 13, 15 (and 28 other bases).
the sum of the sums of the divisors of the first 15 positive integers.

Also:
 189 can be written as sum of two cubes in two ways: 43 + 53 and 63 + (-3)3 (The smallest number that can be written as the sum of 2 positive only cubes in two ways is 1729)
 Divisors of 189: 1, 3, 7, 9, 21, 27, 63, 189

In astronomy
 189 Phthia is a bright rocky main belt asteroid
 NGC 189 is an open cluster in the Cassiopeia constellation

In geography
 Lumsden No. 189, Saskatchewan in southwestern Saskatchewan, Canada

In the military
 189th Airlift Squadron is a unit of the Idaho Air National Guard
 189th Airlift Wing airlift unit, part of the Arkansas National Guard at Little Rock Air Force Base, Arkansas
 189th Infantry Brigade, an infantry brigade of the United States Army based at Fort Bragg
  was a Royal Australian Navy s during World War II
 LSMR-189 was a United States Navy landing ship medium during World War II
 No. 189 Squadron RAF was a Royal Air Force squadron during World War I
  is a United States Navy  replenishment oiler
  was a United States Navy troop transport during the Korean War
  was a United States Navy  during World War II
  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
  was a United States Navy  during World War II

In music
 The song "What a Beautiful Day" (2003) by Chris Cagle includes the lyrics, "Day 189. Oh, I almost lost that girl to my foolish pride"

In transportation
 London Buses route 189
 Air Canada Flight 189 flight from Ottawa to Vancouver crashed on takeoff on June 26, 1978
 USA-189, an experimental satellite launched June 21, 2006
 DB AG electric locomotive class 189, a Siemens EuroSprinter ES64F4

In other fields
 189 is also:
 The year AD 189 or 189 BC
 The atomic number of an element temporarily called Unoctennium
 Minuscule 189 is a Greek minuscule manuscript of the New Testament, on parchment

See also
 List of highways numbered 189
 United Nations Security Council Resolution 189
 United States Supreme Court cases, Volume 189
 Pennsylvania House of Representatives, District 189

External links

 Number Facts and Trivia: 189
 Prime curiosities: 189
 The Number 189
 Number Gossip: 189
 VirtueScience: 189

References

Category:Integers