86637994 has 12 divisors (see below), whose sum is σ = 134287362. Its totient is φ = 41920680.

The previous prime is 86637983. The next prime is 86637997. The reversal of 86637994 is 49973668.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 15015625 = 8463^2 + 3875^2 .

It is a super-2 number, since 2×86637994² = 15012284008688072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86637997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20617 + ... + 24460.

Almost surely, 2^86637994 is an apocalyptic number.

86637994 is a deficient number, since it is larger than the sum of its proper divisors (47649368).

86637994 is a wasteful number, since it uses less digits than its factorization.

86637994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45141 (or 45110 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 86637994 is about 9307.9532658904. The cubic root of 86637994 is about 442.4893231595.

The spelling of 86637994 in words is "eighty-six million, six hundred thirty-seven thousand, nine hundred ninety-four".