57856889 has 2 divisors, whose sum is σ = 57856890. Its totient is φ = 57856888.

The previous prime is 57856879. The next prime is 57856901. The reversal of 57856889 is 98865875.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29073664 + 28783225 = 5392^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 57856889 - 2¹⁶ = 57791353 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57856829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28928444 + 28928445.

It is an arithmetic number, because the mean of its divisors is an integer number (28928445).

Almost surely, 2^57856889 is an apocalyptic number.

It is an amenable number.

57856889 is a deficient number, since it is larger than the sum of its proper divisors (1).

57856889 is an equidigital number, since it uses as much as digits as its factorization.

57856889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 56.

The square root of 57856889 is about 7606.3716054371. The cubic root of 57856889 is about 386.7690311455.

The spelling of 57856889 in words is "fifty-seven million, eight hundred fifty-six thousand, eight hundred eighty-nine".