31679669 has 16 divisors (see below), whose sum is σ = 38282880. Its totient is φ = 25608960.

The previous prime is 31679657. The next prime is 31679699. The reversal of 31679669 is 96697613.

It is a happy number.

It is not a de Polignac number, because 31679669 - 2⁸ = 31679413 is a prime.

It is a super-2 number, since 2×31679669² = 2007202855899122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31679699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41249 + ... + 42009.

It is an arithmetic number, because the mean of its divisors is an integer number (2392680).

Almost surely, 2^31679669 is an apocalyptic number.

It is an amenable number.

31679669 is a deficient number, since it is larger than the sum of its proper divisors (6603211).

31679669 is a wasteful number, since it uses less digits than its factorization.

31679669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its digits is 367416, while the sum is 47.

The square root of 31679669 is about 5628.4695077792. The cubic root of 31679669 is about 316.4172937305.

The spelling of 31679669 in words is "thirty-one million, six hundred seventy-nine thousand, six hundred sixty-nine".