31696965 has 24 divisors (see below), whose sum is σ = 55699800. Its totient is φ = 16671744.

The previous prime is 31696961. The next prime is 31696991. The reversal of 31696965 is 56969613.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 31169889 = 726^2 + 5583^2 .

It is not a de Polignac number, because 31696965 - 2² = 31696961 is a prime.

It is a super-2 number, since 2×31696965² = 2009395180422450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 31696965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31696961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1540 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (2320825).

Almost surely, 2^31696965 is an apocalyptic number.

It is an amenable number.

31696965 is a deficient number, since it is larger than the sum of its proper divisors (24002835).

31696965 is a wasteful number, since it uses less digits than its factorization.

31696965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9733 (or 9730 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 31696965 is about 5630.0057726436. The cubic root of 31696965 is about 316.4748675416.

The spelling of 31696965 in words is "thirty-one million, six hundred ninety-six thousand, nine hundred sixty-five".