90931312 has 20 divisors (see below), whose sum is σ = 176439600. Its totient is φ = 45398528.

The previous prime is 90931307. The next prime is 90931349. The reversal of 90931312 is 21313909.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8064 + ... + 15712.

It is an arithmetic number, because the mean of its divisors is an integer number (8821980).

Almost surely, 2^90931312 is an apocalyptic number.

It is an amenable number.

90931312 is a deficient number, since it is larger than the sum of its proper divisors (85508288).

90931312 is a wasteful number, since it uses less digits than its factorization.

90931312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400 (or 8394 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 90931312 is about 9535.7911050945. The cubic root of 90931312 is about 449.6809458576.

The spelling of 90931312 in words is "ninety million, nine hundred thirty-one thousand, three hundred twelve".