31325929 has 2 divisors, whose sum is σ = 31325930. Its totient is φ = 31325928.

The previous prime is 31325911. The next prime is 31325941. The reversal of 31325929 is 92952313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31304025 + 21904 = 5595^2 + 148^2 .

It is a cyclic number.

It is not a de Polignac number, because 31325929 - 2¹¹ = 31323881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31325894 and 31325903.

It is not a weakly prime, because it can be changed into another prime (31325989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662964 + 15662965.

It is an arithmetic number, because the mean of its divisors is an integer number (15662965).

Almost surely, 2^31325929 is an apocalyptic number.

It is an amenable number.

31325929 is a deficient number, since it is larger than the sum of its proper divisors (1).

31325929 is an equidigital number, since it uses as much as digits as its factorization.

31325929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 31325929 is about 5596.9571197214. The cubic root of 31325929 is about 315.2351615943.

The spelling of 31325929 in words is "thirty-one million, three hundred twenty-five thousand, nine hundred twenty-nine".