197 (number)

197 (one hundred [and] ninety-seven) is the natural number following 196 and preceding 198.

In mathematics

• 197 is an odd number
• 197 is a prime number
  • 197 is a Chen prime
  • 197 is an Eisenstein prime with no imaginary part
  • 197 is a strong prime
  • 197 is a twin prime with 199
  • 197 is the third of a prime quadruplet: 191, 193, 197, 199
  • 197 is the smallest prime number that is the sum of 7 consecutive primes: 17 + 19 + 23 + 29 + 31 + 37 + 41
  • 197 is the sum of the first twelve prime numbers: 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37
• 197 is a centered heptagonal number, a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers
• 197 is a deficient number, as 1 is less than 197
• 197 is a Keith or repfigit number^[1]
• 197 is a palindromic prime in base 14 (101).
• 197 is a square-free number
• 197 is a super Catalan number^[2]
• 197 is an Ulam number
• 197 is the sum of all digits of all two-digit prime numbers: 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
• The binary number of 197 has four 1 digits and four zeroes (11000101)

In geography

• 197 Yonge Street, site of the former Canadian Bank of Commerce building
• House at 197 Hornbine Road, Rehoboth, Massachusetts
• House at 197 Morrison Avenue, Somerville, Massachusetts

In music

• "197" is a song by Norwegian alternative rock group Major Parkinson from their self-titled debut album

In other fields

197 is also:

• The year AD 197 or 197 BC
• The atomic number of an element temporarily called Unennseptium
• 197 Arete is a Main belt asteroid. It has a very bright surface, unusually bright even for a rocky S-type asteroid
• Minuscule 197 is a Greek minuscule manuscript of the New Testament, on parchment

See also

• List of highways numbered 197
• United Nations Security Council Resolution 197
• United States Supreme Court cases, Volume 197
• Pennsylvania House of Representatives, District 197
• Polo Independent Order of Odd Fellows Lodge No. 197
• P.S. 197, Brooklyn, New York

References

External links

Wikimedia Commons has media related to 197 (number).

• Number Facts and Trivia: 197
• The Number 197
• Number Gossip: 197
• The Positive Integer 197
• Virtual Science: 197
• Prime Curiosities: 197