31112923 has 2 divisors, whose sum is σ = 31112924. Its totient is φ = 31112922.

The previous prime is 31112909. The next prime is 31112929. The reversal of 31112923 is 32921113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31112923 - 2²¹ = 29015771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31112894 and 31112903.

It is not a weakly prime, because it can be changed into another prime (31112929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556461 + 15556462.

It is an arithmetic number, because the mean of its divisors is an integer number (15556462).

Almost surely, 2^31112923 is an apocalyptic number.

31112923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112923 is an equidigital number, since it uses as much as digits as its factorization.

31112923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 31112923 is about 5577.8959294702. The cubic root of 31112923 is about 314.5190375721.

The spelling of 31112923 in words is "thirty-one million, one hundred twelve thousand, nine hundred twenty-three".