31979663 has 4 divisors (see below), whose sum is σ = 33082440. Its totient is φ = 30876888.

The previous prime is 31979627. The next prime is 31979687. The reversal of 31979663 is 36697913.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31979663 - 2¹⁴ = 31963279 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 (31979863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551345 + ... + 551402.

It is an arithmetic number, because the mean of its divisors is an integer number (8270610).

Almost surely, 2^31979663 is an apocalyptic number.

31979663 is a deficient number, since it is larger than the sum of its proper divisors (1102777).

31979663 is a wasteful number, since it uses less digits than its factorization.

31979663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102776.

The product of its digits is 183708, while the sum is 44.

The square root of 31979663 is about 5655.0564099751. The cubic root of 31979663 is about 317.4129399425.

The spelling of 31979663 in words is "thirty-one million, nine hundred seventy-nine thousand, six hundred sixty-three".