31697607 has 4 divisors (see below), whose sum is σ = 42263480. Its totient is φ = 21131736.

The previous prime is 31697587. The next prime is 31697623. The reversal of 31697607 is 70679613.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31697607 - 2¹² = 31693511 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 (31697647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5282932 + ... + 5282937.

It is an arithmetic number, because the mean of its divisors is an integer number (10565870).

Almost surely, 2^31697607 is an apocalyptic number.

31697607 is a deficient number, since it is larger than the sum of its proper divisors (10565873).

31697607 is a wasteful number, since it uses less digits than its factorization.

31697607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565872.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 31697607 is about 5630.0627882822. The cubic root of 31697607 is about 316.4770041867.

The spelling of 31697607 in words is "thirty-one million, six hundred ninety-seven thousand, six hundred seven".