31314979 has 2 divisors, whose sum is σ = 31314980. Its totient is φ = 31314978.

The previous prime is 31314977. The next prime is 31314989. The reversal of 31314979 is 97941313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31314979 - 2¹ = 31314977 is a prime.

Together with 31314977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31314971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657489 + 15657490.

It is an arithmetic number, because the mean of its divisors is an integer number (15657490).

Almost surely, 2^31314979 is an apocalyptic number.

31314979 is a deficient number, since it is larger than the sum of its proper divisors (1).

31314979 is an equidigital number, since it uses as much as digits as its factorization.

31314979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 31314979 is about 5595.9788241200. The cubic root of 31314979 is about 315.1984270913.

The spelling of 31314979 in words is "thirty-one million, three hundred fourteen thousand, nine hundred seventy-nine".