31982957 has 2 divisors, whose sum is σ = 31982958. Its totient is φ = 31982956.

The previous prime is 31982939. The next prime is 31982987. The reversal of 31982957 is 75928913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31147561 + 835396 = 5581^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 31982957 - 2¹⁰ = 31981933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31982987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15991478 + 15991479.

It is an arithmetic number, because the mean of its divisors is an integer number (15991479).

Almost surely, 2^31982957 is an apocalyptic number.

It is an amenable number.

31982957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31982957 is an equidigital number, since it uses as much as digits as its factorization.

31982957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 31982957 is about 5655.3476462548. The cubic root of 31982957 is about 317.4238377259.

The spelling of 31982957 in words is "thirty-one million, nine hundred eighty-two thousand, nine hundred fifty-seven".