57788989 has 2 divisors, whose sum is σ = 57788990. Its totient is φ = 57788988.

The previous prime is 57788981. The next prime is 57788993. The reversal of 57788989 is 98988775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32205625 + 25583364 = 5675^2 + 5058^2 .

It is a cyclic number.

It is not a de Polignac number, because 57788989 - 2³ = 57788981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57788981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28894494 + 28894495.

It is an arithmetic number, because the mean of its divisors is an integer number (28894495).

Almost surely, 2^57788989 is an apocalyptic number.

It is an amenable number.

57788989 is a deficient number, since it is larger than the sum of its proper divisors (1).

57788989 is an equidigital number, since it uses as much as digits as its factorization.

57788989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 61.

The square root of 57788989 is about 7601.9069318165. The cubic root of 57788989 is about 386.6176697560.

The spelling of 57788989 in words is "fifty-seven million, seven hundred eighty-eight thousand, nine hundred eighty-nine".