31696997 has 8 divisors (see below), whose sum is σ = 33519360. Its totient is φ = 29890080.

The previous prime is 31696991. The next prime is 31697047. The reversal of 31696997 is 79969613.

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-31696997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31696991) 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 7 ways as a sum of consecutive naturals, for example, 497 + ... + 7977.

It is an arithmetic number, because the mean of its divisors is an integer number (4189920).

Almost surely, 2^31696997 is an apocalyptic number.

It is an amenable number.

31696997 is a deficient number, since it is larger than the sum of its proper divisors (1822363).

31696997 is a wasteful number, since it uses less digits than its factorization.

31696997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723.

The product of its digits is 551124, while the sum is 50.

The square root of 31696997 is about 5630.0086145582. The cubic root of 31696997 is about 316.4749740417.

The spelling of 31696997 in words is "thirty-one million, six hundred ninety-six thousand, nine hundred ninety-seven".