97865231 has 2 divisors, whose sum is σ = 97865232. Its totient is φ = 97865230.

The previous prime is 97865221. The next prime is 97865249. The reversal of 97865231 is 13256879.

It is a weak prime.

It is an emirp because it is prime and its reverse (13256879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97865231 - 2¹⁸ = 97603087 is a prime.

It is a super-2 number, since 2×97865231² = 19155206877366722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97865221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48932615 + 48932616.

It is an arithmetic number, because the mean of its divisors is an integer number (48932616).

Almost surely, 2^97865231 is an apocalyptic number.

97865231 is a deficient number, since it is larger than the sum of its proper divisors (1).

97865231 is an equidigital number, since it uses as much as digits as its factorization.

97865231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 97865231 is about 9892.6857323985. The cubic root of 97865231 is about 460.8321907945.

The spelling of 97865231 in words is "ninety-seven million, eight hundred sixty-five thousand, two hundred thirty-one".