31995923 has 2 divisors, whose sum is σ = 31995924. Its totient is φ = 31995922.

The previous prime is 31995911. The next prime is 31995947. The reversal of 31995923 is 32959913.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31995923 - 2⁴ = 31995907 is a prime.

It is not a weakly prime, because it can be changed into another prime (31995983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15997961 + 15997962.

It is an arithmetic number, because the mean of its divisors is an integer number (15997962).

Almost surely, 2^31995923 is an apocalyptic number.

31995923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31995923 is an equidigital number, since it uses as much as digits as its factorization.

31995923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 41.

The square root of 31995923 is about 5656.4938787203. The cubic root of 31995923 is about 317.4667268333.

The spelling of 31995923 in words is "thirty-one million, nine hundred ninety-five thousand, nine hundred twenty-three".