31241939 has 2 divisors, whose sum is σ = 31241940. Its totient is φ = 31241938.

The previous prime is 31241927. The next prime is 31241941. The reversal of 31241939 is 93914213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31241939 - 2⁴ = 31241923 is a prime.

Together with 31241941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31241039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620969 + 15620970.

It is an arithmetic number, because the mean of its divisors is an integer number (15620970).

Almost surely, 2^31241939 is an apocalyptic number.

31241939 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241939 is an equidigital number, since it uses as much as digits as its factorization.

31241939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 31241939 is about 5589.4488994891. The cubic root of 31241939 is about 314.9531768818.

The spelling of 31241939 in words is "thirty-one million, two hundred forty-one thousand, nine hundred thirty-nine".