56540791 has 2 divisors, whose sum is σ = 56540792. Its totient is φ = 56540790.

The previous prime is 56540777. The next prime is 56540801. The reversal of 56540791 is 19704565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56540791 - 2⁷ = 56540663 is a prime.

It is a super-2 number, since 2×56540791² = 6393722093811362, 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 56540791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56540711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270395 + 28270396.

It is an arithmetic number, because the mean of its divisors is an integer number (28270396).

Almost surely, 2^56540791 is an apocalyptic number.

56540791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540791 is an equidigital number, since it uses as much as digits as its factorization.

56540791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 56540791 is about 7519.3610765809. The cubic root of 56540791 is about 383.8138361763.

The spelling of 56540791 in words is "fifty-six million, five hundred forty thousand, seven hundred ninety-one".