56756569 has 2 divisors, whose sum is σ = 56756570. Its totient is φ = 56756568.

The previous prime is 56756563. The next prime is 56756611. The reversal of 56756569 is 96565765.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 1996569 = 7400^2 + 1413^2 .

It is a cyclic number.

It is not a de Polignac number, because 56756569 - 2³ = 56756561 is a prime.

It is a super-2 number, since 2×56756569² = 6442616249303522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56756561) 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, 28378284 + 28378285.

It is an arithmetic number, because the mean of its divisors is an integer number (28378285).

Almost surely, 2^56756569 is an apocalyptic number.

It is an amenable number.

56756569 is a deficient number, since it is larger than the sum of its proper divisors (1).

56756569 is an equidigital number, since it uses as much as digits as its factorization.

56756569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701000, while the sum is 49.

The square root of 56756569 is about 7533.6955738867. The cubic root of 56756569 is about 384.3014690816.

The spelling of 56756569 in words is "fifty-six million, seven hundred fifty-six thousand, five hundred sixty-nine".