97 (number)
97 is the natural number following 96 and preceding 98. It is a prime number and the only prime in the nineties.
In mathematics
97 is:- the 25th prime number, following 89 and preceding 101.
- a Proth prime and a Pierpont prime as it is 3 × 25 + 1.
- the eleventh member of the Mian–Chowla sequence.
- a self number in base 10, since there is no integer that added to its own digits, adds up to 97.
- the smallest odd prime that is not a cluster prime.
- the highest two-digit number where the sum of its digits is a square.
- the number of primes less than 29.
- The numbers 97, 907, 9007, 90007 and 900007 are all primes, and they are all happy primes. However, 9000007 is composite and has the factorization 277 × 32491.
- an emirp with 79.
- an isolated prime, since 95 and 99 are not prime.
In other fields
97 is:- The 10-97 police code means "arrived on the scene"
- The decimal unicode number representing the Latin lowercase "a"