57185489 has 2 divisors, whose sum is σ = 57185490. Its totient is φ = 57185488.

The previous prime is 57185389. The next prime is 57185503. The reversal of 57185489 is 98458175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 1459264 = 7465^2 + 1208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57185489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57185389) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28592744 + 28592745.

It is an arithmetic number, because the mean of its divisors is an integer number (28592745).

Almost surely, 2^57185489 is an apocalyptic number.

It is an amenable number.

57185489 is a deficient number, since it is larger than the sum of its proper divisors (1).

57185489 is an equidigital number, since it uses as much as digits as its factorization.

57185489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The square root of 57185489 is about 7562.1087667396. The cubic root of 57185489 is about 385.2671199598.

The spelling of 57185489 in words is "fifty-seven million, one hundred eighty-five thousand, four hundred eighty-nine".