31264979 has 2 divisors, whose sum is σ = 31264980. Its totient is φ = 31264978.

The previous prime is 31264969. The next prime is 31264993. The reversal of 31264979 is 97946213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31264979 is a prime.

It is not a weakly prime, because it can be changed into another prime (31264939) 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 as a sum of consecutive naturals, namely, 15632489 + 15632490.

It is an arithmetic number, because the mean of its divisors is an integer number (15632490).

Almost surely, 2^31264979 is an apocalyptic number.

31264979 is a deficient number, since it is larger than the sum of its proper divisors (1).

31264979 is an equidigital number, since it uses as much as digits as its factorization.

31264979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 31264979 is about 5591.5095457309. The cubic root of 31264979 is about 315.0305807213.

The spelling of 31264979 in words is "thirty-one million, two hundred sixty-four thousand, nine hundred seventy-nine".