97457831 has 16 divisors (see below), whose sum is σ = 106997760. Its totient is φ = 88476960.

The previous prime is 97457807. The next prime is 97457839. The reversal of 97457831 is 13875479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97457831 is a prime.

It is a super-2 number, since 2×97457831² = 18996057646449122, 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 (97457839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36500 + ... + 39078.

It is an arithmetic number, because the mean of its divisors is an integer number (6687360).

Almost surely, 2^97457831 is an apocalyptic number.

97457831 is a deficient number, since it is larger than the sum of its proper divisors (9539929).

97457831 is a wasteful number, since it uses less digits than its factorization.

97457831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686.

The product of its digits is 211680, while the sum is 44.

The square root of 97457831 is about 9872.0732878155. The cubic root of 97457831 is about 460.1918402729.

It can be divided in two parts, 9745 and 7831, that added together give a cube (17576 = 26³).

The spelling of 97457831 in words is "ninety-seven million, four hundred fifty-seven thousand, eight hundred thirty-one".