31690612 has 6 divisors (see below), whose sum is σ = 55458578. Its totient is φ = 15845304.

The previous prime is 31690609. The next prime is 31690627. The reversal of 31690612 is 21609613.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 7817616 = 4886^2 + 2796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961323 + ... + 3961330.

Almost surely, 2^31690612 is an apocalyptic number.

It is an amenable number.

31690612 is a deficient number, since it is larger than the sum of its proper divisors (23767966).

31690612 is a wasteful number, since it uses less digits than its factorization.

31690612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922657 (or 7922655 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31690612 is about 5629.4415353568. The cubic root of 31690612 is about 316.4537225184.

The spelling of 31690612 in words is "thirty-one million, six hundred ninety thousand, six hundred twelve".