197 (number)

← 196 197 198 →
← 190 191 192 193 194 195 196 197 198 199 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred ninety-seven
Ordinal	197th (one hundred and ninety-seventh)
Factorization	197
Prime	yes
Roman numeral	CXCVII
Binary	110001012
Ternary	210223
Quaternary	30114
Quinary	12425
Senary	5256
Octal	3058
Duodecimal	14512
Hexadecimal	C516
Vigesimal	9H20
Base 36	5H36

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
• 197 is a palindromic prime in base 14 (101).
• 197 is a square-free number
• 197 is a super Catalan number
• 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

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