31693700 has 18 divisors (see below), whose sum is σ = 68775546. Its totient is φ = 12677440.

The previous prime is 31693693. The next prime is 31693703. The reversal of 31693700 is 739613.

It can be written as a sum of positive squares in 3 ways, for example, as 244036 + 31449664 = 494^2 + 5608^2 .

It is not an unprimeable number, because it can be changed into a prime (31693703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158369 + ... + 158568.

Almost surely, 2^31693700 is an apocalyptic number.

It is an amenable number.

31693700 is an abundant number, since it is smaller than the sum of its proper divisors (37081846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31693700 is a wasteful number, since it uses less digits than its factorization.

31693700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316951 (or 316944 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 31693700 is about 5629.7158009974. The cubic root of 31693700 is about 316.4640008238.

The spelling of 31693700 in words is "thirty-one million, six hundred ninety-three thousand, seven hundred".