56157877 has 2 divisors, whose sum is σ = 56157878. Its totient is φ = 56157876.

The previous prime is 56157839. The next prime is 56157887. The reversal of 56157877 is 77875165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30846916 + 25310961 = 5554^2 + 5031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56157877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56157887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28078938 + 28078939.

It is an arithmetic number, because the mean of its divisors is an integer number (28078939).

Almost surely, 2^56157877 is an apocalyptic number.

It is an amenable number.

56157877 is a deficient number, since it is larger than the sum of its proper divisors (1).

56157877 is an equidigital number, since it uses as much as digits as its factorization.

56157877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 411600, while the sum is 46.

The square root of 56157877 is about 7493.8559500433. The cubic root of 56157877 is about 382.9454323520.

The spelling of 56157877 in words is "fifty-six million, one hundred fifty-seven thousand, eight hundred seventy-seven".