197 (number)
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| ||||
|---|---|---|---|---|
| Cardinal | one hundred ninety-seven | |||
| Ordinal | 197th (one hundred ninety-seventh) | |||
| Factorization | prime | |||
| Prime | 45th | |||
| Greek numeral | ΡϞΖ´ | |||
| Roman numeral | CXCVII | |||
| Binary | 110001012 | |||
| Ternary | 210223 | |||
| Senary | 5256 | |||
| Octal | 3058 | |||
| Duodecimal | 14512 | |||
| Hexadecimal | C516 | |||
197 (one hundred [and] ninety-seven) is the natural number following 196 and preceding 198.
In mathematics[edit]
- 197 is a prime number, 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, and 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 Schröder–Hipparchus number, counting for instance the number of ways of subdividing a heptagon by a non-crossing set of its diagonals.[1]
In other fields[edit]
197 is also:
- A police emergency telephone number in Tunisia
- Number enquiry telephone number in Nepal
- a song by Norwegian alternative rock group Major Parkinson from their self-titled debut album
See also[edit]
References[edit]
Wikimedia Commons has media related to 197 (number).