57406813 has 2 divisors, whose sum is σ = 57406814. Its totient is φ = 57406812.

The previous prime is 57406801. The next prime is 57406819. The reversal of 57406813 is 31860475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28965924 + 28440889 = 5382^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 57406813 - 2⁹ = 57406301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57406819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28703406 + 28703407.

It is an arithmetic number, because the mean of its divisors is an integer number (28703407).

Almost surely, 2^57406813 is an apocalyptic number.

It is an amenable number.

57406813 is a deficient number, since it is larger than the sum of its proper divisors (1).

57406813 is an equidigital number, since it uses as much as digits as its factorization.

57406813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 57406813 is about 7576.7283836759. The cubic root of 57406813 is about 385.7635109884.

The spelling of 57406813 in words is "fifty-seven million, four hundred six thousand, eight hundred thirteen".