86634657 has 8 divisors (see below), whose sum is σ = 128347680. Its totient is φ = 57756420.

The previous prime is 86634631. The next prime is 86634659. The reversal of 86634657 is 75643668.

86634657 is a `hidden beast` number, since 8 + 6 + 634 + 6 + 5 + 7 = 666.

It is not a de Polignac number, because 86634657 - 2¹⁰ = 86633633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86634659) 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, 1604319 + ... + 1604372.

It is an arithmetic number, because the mean of its divisors is an integer number (16043460).

Almost surely, 2^86634657 is an apocalyptic number.

It is an amenable number.

86634657 is a deficient number, since it is larger than the sum of its proper divisors (41713023).

86634657 is a wasteful number, since it uses less digits than its factorization.

86634657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208700 (or 3208694 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 86634657 is about 9307.7740088595. The cubic root of 86634657 is about 442.4836420267.

The spelling of 86634657 in words is "eighty-six million, six hundred thirty-four thousand, six hundred fifty-seven".