31920694 has 8 divisors (see below), whose sum is σ = 51564240. Its totient is φ = 14732616.

The previous prime is 31920689. The next prime is 31920697. The reversal of 31920694 is 49602913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31920697) 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 3 ways as a sum of consecutive naturals, for example, 613834 + ... + 613885.

It is an arithmetic number, because the mean of its divisors is an integer number (6445530).

Almost surely, 2^31920694 is an apocalyptic number.

31920694 is a deficient number, since it is larger than the sum of its proper divisors (19643546).

31920694 is a wasteful number, since it uses less digits than its factorization.

31920694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227734.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 31920694 is about 5649.8401747306. The cubic root of 31920694 is about 317.2177217064.

The spelling of 31920694 in words is "thirty-one million, nine hundred twenty thousand, six hundred ninety-four".