86931008 has 14 divisors (see below), whose sum is σ = 172503846. Its totient is φ = 43465472.

The previous prime is 86931001. The next prime is 86931043. The reversal of 86931008 is 80013968.

It can be written as a sum of positive squares in only one way, i.e., 66064384 + 20866624 = 8128^2 + 4568^2 .

It is not an unprimeable number, because it can be changed into a prime (86931001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 679085 + ... + 679212.

Almost surely, 2^86931008 is an apocalyptic number.

It is an amenable number.

86931008 is a deficient number, since it is larger than the sum of its proper divisors (85572838).

86931008 is a wasteful number, since it uses less digits than its factorization.

86931008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358309 (or 1358299 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 86931008 is about 9323.6799601874. The cubic root of 86931008 is about 442.9876021376.

The spelling of 86931008 in words is "eighty-six million, nine hundred thirty-one thousand, eight".