31868965 has 8 divisors (see below), whose sum is σ = 40492440. Its totient is φ = 23995392.

The previous prime is 31868939. The next prime is 31868983. The reversal of 31868965 is 56986813.

It can be written as a sum of positive squares in 4 ways, for example, as 5171076 + 26697889 = 2274^2 + 5167^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31868965 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 187380 + ... + 187549.

It is an arithmetic number, because the mean of its divisors is an integer number (5061555).

Almost surely, 2^31868965 is an apocalyptic number.

It is an amenable number.

31868965 is a deficient number, since it is larger than the sum of its proper divisors (8623475).

31868965 is a wasteful number, since it uses less digits than its factorization.

31868965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374951.

The product of its digits is 311040, while the sum is 46.

The square root of 31868965 is about 5645.2604014341. The cubic root of 31868965 is about 317.0462736007.

The spelling of 31868965 in words is "thirty-one million, eight hundred sixty-eight thousand, nine hundred sixty-five".