56699257 has 2 divisors, whose sum is σ = 56699258. Its totient is φ = 56699256.

The previous prime is 56699221. The next prime is 56699297. The reversal of 56699257 is 75299665.

56699257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53890281 + 2808976 = 7341^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 56699257 - 2⁷ = 56699129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56699257.

It is not a weakly prime, because it can be changed into another prime (56699297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28349628 + 28349629.

It is an arithmetic number, because the mean of its divisors is an integer number (28349629).

Almost surely, 2^56699257 is an apocalyptic number.

It is an amenable number.

56699257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56699257 is an equidigital number, since it uses as much as digits as its factorization.

56699257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The square root of 56699257 is about 7529.8909022641. The cubic root of 56699257 is about 384.1720714108.

The spelling of 56699257 in words is "fifty-six million, six hundred ninety-nine thousand, two hundred fifty-seven".