31079527949 has 2 divisors, whose sum is σ = 31079527950. Its totient is φ = 31079527948.

The previous prime is 31079527939. The next prime is 31079528041. The reversal of 31079527949 is 94972597013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23904252100 + 7175275849 = 154610^2 + 84707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31079527949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31079527894 and 31079527903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31079527939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15539763974 + 15539763975.

It is an arithmetic number, because the mean of its divisors is an integer number (15539763975).

Almost surely, 2^31079527949 is an apocalyptic number.

It is an amenable number.

31079527949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31079527949 is an equidigital number, since it uses as much as digits as its factorization.

31079527949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 31079527949 in words is "thirty-one billion, seventy-nine million, five hundred twenty-seven thousand, nine hundred forty-nine".