40568939 has 2 divisors, whose sum is σ = 40568940. Its totient is φ = 40568938.

The previous prime is 40568917. The next prime is 40568951. The reversal of 40568939 is 93986504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40568939 - 2⁸ = 40568683 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40568939.

It is not a weakly prime, because it can be changed into another prime (40568039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20284469 + 20284470.

It is an arithmetic number, because the mean of its divisors is an integer number (20284470).

Almost surely, 2^40568939 is an apocalyptic number.

40568939 is a deficient number, since it is larger than the sum of its proper divisors (1).

40568939 is an equidigital number, since it uses as much as digits as its factorization.

40568939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 40568939 is about 6369.3750870866. The cubic root of 40568939 is about 343.6090152867.

The spelling of 40568939 in words is "forty million, five hundred sixty-eight thousand, nine hundred thirty-nine".