31013929 has 2 divisors, whose sum is σ = 31013930. Its totient is φ = 31013928.

The previous prime is 31013911. The next prime is 31013953. The reversal of 31013929 is 92931013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30824704 + 189225 = 5552^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013929 - 2⁹ = 31013417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31013897 and 31013906.

It is not a weakly prime, because it can be changed into another prime (31016929) 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, 15506964 + 15506965.

It is an arithmetic number, because the mean of its divisors is an integer number (15506965).

Almost surely, 2^31013929 is an apocalyptic number.

It is an amenable number.

31013929 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013929 is an equidigital number, since it uses as much as digits as its factorization.

31013929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 31013929 is about 5569.0150834775. The cubic root of 31013929 is about 314.1851079694.

The spelling of 31013929 in words is "thirty-one million, thirteen thousand, nine hundred twenty-nine".