40731937 has 2 divisors, whose sum is σ = 40731938. Its totient is φ = 40731936.

The previous prime is 40731893. The next prime is 40731941. The reversal of 40731937 is 73913704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29062881 + 11669056 = 5391^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 40731937 - 2⁷ = 40731809 is a prime.

It is not a weakly prime, because it can be changed into another prime (40731997) 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, 20365968 + 20365969.

It is an arithmetic number, because the mean of its divisors is an integer number (20365969).

Almost surely, 2^40731937 is an apocalyptic number.

It is an amenable number.

40731937 is a deficient number, since it is larger than the sum of its proper divisors (1).

40731937 is an equidigital number, since it uses as much as digits as its factorization.

40731937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 40731937 is about 6382.1577072335. The cubic root of 40731937 is about 344.0685847792.

The spelling of 40731937 in words is "forty million, seven hundred thirty-one thousand, nine hundred thirty-seven".