31940957 has 4 divisors (see below), whose sum is σ = 33622080. Its totient is φ = 30259836.

The previous prime is 31940933. The next prime is 31940963. The reversal of 31940957 is 75904913.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75904913 = 7 ⋅10843559.

It is a cyclic number.

It is not a de Polignac number, because 31940957 - 2¹⁴ = 31924573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31940957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31940917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840533 + ... + 840570.

It is an arithmetic number, because the mean of its divisors is an integer number (8405520).

Almost surely, 2^31940957 is an apocalyptic number.

It is an amenable number.

31940957 is a deficient number, since it is larger than the sum of its proper divisors (1681123).

31940957 is a wasteful number, since it uses less digits than its factorization.

31940957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681122.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 31940957 is about 5651.6331268050. The cubic root of 31940957 is about 317.2848299286.

The spelling of 31940957 in words is "thirty-one million, nine hundred forty thousand, nine hundred fifty-seven".