86691874 has 16 divisors (see below), whose sum is σ = 139239000. Its totient is φ = 40336384.

The previous prime is 86691863. The next prime is 86691883. The reversal of 86691874 is 47819668.

It can be written as a sum of positive squares in 4 ways, for example, as 71520849 + 15171025 = 8457^2 + 3895^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11299 + ... + 17350.

Almost surely, 2^86691874 is an apocalyptic number.

86691874 is a deficient number, since it is larger than the sum of its proper divisors (52547126).

86691874 is a wasteful number, since it uses less digits than its factorization.

86691874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28757.

The product of its digits is 580608, while the sum is 49.

The square root of 86691874 is about 9310.8471150589. The cubic root of 86691874 is about 442.5810319008.

The spelling of 86691874 in words is "eighty-six million, six hundred ninety-one thousand, eight hundred seventy-four".