57186013 has 2 divisors, whose sum is σ = 57186014. Its totient is φ = 57186012.

The previous prime is 57186007. The next prime is 57186049. The reversal of 57186013 is 31068175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51222649 + 5963364 = 7157^2 + 2442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57186013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57186313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28593006 + 28593007.

It is an arithmetic number, because the mean of its divisors is an integer number (28593007).

Almost surely, 2^57186013 is an apocalyptic number.

It is an amenable number.

57186013 is a deficient number, since it is larger than the sum of its proper divisors (1).

57186013 is an equidigital number, since it uses as much as digits as its factorization.

57186013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 57186013 is about 7562.1434130807. The cubic root of 57186013 is about 385.2682967115.

The spelling of 57186013 in words is "fifty-seven million, one hundred eighty-six thousand, thirteen".