56687759 has 2 divisors, whose sum is σ = 56687760. Its totient is φ = 56687758.

The previous prime is 56687753. The next prime is 56687783. The reversal of 56687759 is 95778665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56687759 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 56687759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56687753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343879 + 28343880.

It is an arithmetic number, because the mean of its divisors is an integer number (28343880).

Almost surely, 2^56687759 is an apocalyptic number.

56687759 is a deficient number, since it is larger than the sum of its proper divisors (1).

56687759 is an equidigital number, since it uses as much as digits as its factorization.

56687759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 53.

The square root of 56687759 is about 7529.1273730758. The cubic root of 56687759 is about 384.1461009993.

The spelling of 56687759 in words is "fifty-six million, six hundred eighty-seven thousand, seven hundred fifty-nine".