56711857 has 2 divisors, whose sum is σ = 56711858. Its totient is φ = 56711856.

The previous prime is 56711839. The next prime is 56711869. The reversal of 56711857 is 75811765.

56711857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55965361 + 746496 = 7481^2 + 864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56711857 is a prime.

It is not a weakly prime, because it can be changed into another prime (56711807) 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, 28355928 + 28355929.

It is an arithmetic number, because the mean of its divisors is an integer number (28355929).

Almost surely, 2^56711857 is an apocalyptic number.

It is an amenable number.

56711857 is a deficient number, since it is larger than the sum of its proper divisors (1).

56711857 is an equidigital number, since it uses as much as digits as its factorization.

56711857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 40.

The square root of 56711857 is about 7530.7275212957. The cubic root of 56711857 is about 384.2005268664.

The spelling of 56711857 in words is "fifty-six million, seven hundred eleven thousand, eight hundred fifty-seven".