57776813 has 2 divisors, whose sum is σ = 57776814. Its totient is φ = 57776812.

The previous prime is 57776809. The next prime is 57776819. The reversal of 57776813 is 31867775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54140164 + 3636649 = 7358^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 57776813 - 2² = 57776809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57776819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28888406 + 28888407.

It is an arithmetic number, because the mean of its divisors is an integer number (28888407).

Almost surely, 2^57776813 is an apocalyptic number.

It is an amenable number.

57776813 is a deficient number, since it is larger than the sum of its proper divisors (1).

57776813 is an equidigital number, since it uses as much as digits as its factorization.

57776813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 44.

The square root of 57776813 is about 7601.1060379395. The cubic root of 57776813 is about 386.5905147133.

The spelling of 57776813 in words is "fifty-seven million, seven hundred seventy-six thousand, eight hundred thirteen".