87797031 has 32 divisors (see below), whose sum is σ = 138475008. Its totient is φ = 48437760.

The previous prime is 87797029. The next prime is 87797033. The reversal of 87797031 is 13079778.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87797029) and next prime (87797033).

It is not a de Polignac number, because 87797031 - 2¹ = 87797029 is a prime.

It is a super-2 number, since 2×87797031² = 15416637304829922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87797033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91651 + ... + 92603.

It is an arithmetic number, because the mean of its divisors is an integer number (4327344).

Almost surely, 2^87797031 is an apocalyptic number.

87797031 is a deficient number, since it is larger than the sum of its proper divisors (50677977).

87797031 is a wasteful number, since it uses less digits than its factorization.

87797031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 87797031 is about 9370.0069903923. The cubic root of 87797031 is about 444.4537859125.

The spelling of 87797031 in words is "eighty-seven million, seven hundred ninety-seven thousand, thirty-one".