97156631 has 8 divisors (see below), whose sum is σ = 114142224. Its totient is φ = 81529920.

The previous prime is 97156589. The next prime is 97156643. The reversal of 97156631 is 13665179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97156631 - 2¹⁸ = 96894487 is a prime.

It is a super-2 number, since 2×97156631² = 18878821894540322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97156331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339566 + ... + 339851.

It is an arithmetic number, because the mean of its divisors is an integer number (14267778).

Almost surely, 2^97156631 is an apocalyptic number.

97156631 is a deficient number, since it is larger than the sum of its proper divisors (16985593).

97156631 is a wasteful number, since it uses less digits than its factorization.

97156631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679441.

The product of its digits is 34020, while the sum is 38.

The square root of 97156631 is about 9856.8063286239. The cubic root of 97156631 is about 459.7172663953.

The spelling of 97156631 in words is "ninety-seven million, one hundred fifty-six thousand, six hundred thirty-one".