56656729 has 2 divisors, whose sum is σ = 56656730. Its totient is φ = 56656728.

The previous prime is 56656709. The next prime is 56656753. The reversal of 56656729 is 92765665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47293129 + 9363600 = 6877^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 56656729 - 2⁹ = 56656217 is a prime.

It is not a weakly prime, because it can be changed into another prime (56656709) 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, 28328364 + 28328365.

It is an arithmetic number, because the mean of its divisors is an integer number (28328365).

Almost surely, 2^56656729 is an apocalyptic number.

It is an amenable number.

56656729 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656729 is an equidigital number, since it uses as much as digits as its factorization.

56656729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 56656729 is about 7527.0664272345. The cubic root of 56656729 is about 384.0759963339.

The spelling of 56656729 in words is "fifty-six million, six hundred fifty-six thousand, seven hundred twenty-nine".