40137931 has 2 divisors, whose sum is σ = 40137932. Its totient is φ = 40137930.

The previous prime is 40137919. The next prime is 40137941. The reversal of 40137931 is 13973104.

40137931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40137931 - 2⁷ = 40137803 is a prime.

It is a super-2 number, since 2×40137931² = 3222107009921522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40137931.

It is not a weakly prime, because it can be changed into another prime (40137941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20068965 + 20068966.

It is an arithmetic number, because the mean of its divisors is an integer number (20068966).

Almost surely, 2^40137931 is an apocalyptic number.

40137931 is a deficient number, since it is larger than the sum of its proper divisors (1).

40137931 is an equidigital number, since it uses as much as digits as its factorization.

40137931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 40137931 is about 6335.4503391630. The cubic root of 40137931 is about 342.3878361830.

The spelling of 40137931 in words is "forty million, one hundred thirty-seven thousand, nine hundred thirty-one".