197 (number)

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
• 197 is a palindromic prime in base 14.
• 197 is a square-free number
• 197 is a super Catalan number
• 197 is an Ulam number
• 197 is the sum of the 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

  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

• A police emergency telephone number in Tunisia
• The year AD 197 or 197 BC
• The atomic number of an element temporarily called
• 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