57530857 has 2 divisors, whose sum is σ = 57530858. Its totient is φ = 57530856.

The previous prime is 57530807. The next prime is 57530887. The reversal of 57530857 is 75803575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 15397776 = 6491^2 + 3924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57530857 is a prime.

It is not a weakly prime, because it can be changed into another prime (57530807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28765428 + 28765429.

It is an arithmetic number, because the mean of its divisors is an integer number (28765429).

Almost surely, 2^57530857 is an apocalyptic number.

It is an amenable number.

57530857 is a deficient number, since it is larger than the sum of its proper divisors (1).

57530857 is an equidigital number, since it uses as much as digits as its factorization.

57530857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 57530857 is about 7584.9098214811. The cubic root of 57530857 is about 386.0411622636.

The spelling of 57530857 in words is "fifty-seven million, five hundred thirty thousand, eight hundred fifty-seven".