86691875 has 20 divisors (see below), whose sum is σ = 112089120. Its totient is φ = 66948000.

The previous prime is 86691863. The next prime is 86691883. The reversal of 86691875 is 57819668.

It is a happy number.

It is not a de Polignac number, because 86691875 - 2⁶ = 86691811 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15734 + ... + 20516.

It is an arithmetic number, because the mean of its divisors is an integer number (5604456).

Almost surely, 2^86691875 is an apocalyptic number.

86691875 is a deficient number, since it is larger than the sum of its proper divisors (25397245).

86691875 is an equidigital number, since it uses as much as digits as its factorization.

86691875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832 (or 4817 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 86691875 is about 9310.8471687597. The cubic root of 86691875 is about 442.5810336025.

The spelling of 86691875 in words is "eighty-six million, six hundred ninety-one thousand, eight hundred seventy-five".