97 (number)

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← 96 97 98 →
Cardinal ninety-seven
Ordinal 97th
(ninety-seventh)
Factorization prime
Prime 25th
Divisors 1, 97
Greek numeral ϞΖ´
Roman numeral XCVII
Binary 11000012
Ternary 101213
Quaternary 12014
Quinary 3425
Senary 2416
Octal 1418
Duodecimal 8112
Hexadecimal 6116
Vigesimal 4H20
Base 36 2P36

97 (ninety-seven) is the natural number following 96 and preceding 98.

In mathematics[edit]

97 is:

  • the 25th prime number (the largest two-digit prime number in base 10), following 89 and preceding 101.
  • a Proth prime as it is 3 × 25 + 1.[1]
  • the eleventh member of the Mian–Chowla sequence.[2]
  • a self number in base 10, since there is no integer that added to its own digits adds up to 97.[3]
  • the highest two digit number where the sum of its digits is a square.

The numbers 97, 907, 9007, 90007 and 900007 are happy primes. However, 9000007 (read as nine million seven) is composite and has the factorisation 277 × 32491.

In astronomy[edit]

In other fields[edit]

Ninety-seven is:

In music[edit]

In sports[edit]

See also[edit]

References[edit]

  1. ^ "Sloane's A080076 : Proth primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28. 
  2. ^ "Sloane's A005282 : Mian-Chowla sequence". The On-Line Encyclopedia of integer Sequences. OEIS Foundation. Retrieved 2016-05-28. 
  3. ^ "Sloane's A003052 : Self numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28. 
  4. ^ https://unicodelookup.com/