57978719 has 2 divisors, whose sum is σ = 57978720. Its totient is φ = 57978718.

The previous prime is 57978703. The next prime is 57978727. The reversal of 57978719 is 91787975.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57978719 - 2⁴ = 57978703 is a prime.

It is a super-2 number, since 2×57978719² = 6723063713761922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57978779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28989359 + 28989360.

It is an arithmetic number, because the mean of its divisors is an integer number (28989360).

Almost surely, 2^57978719 is an apocalyptic number.

57978719 is a deficient number, since it is larger than the sum of its proper divisors (1).

57978719 is an equidigital number, since it uses as much as digits as its factorization.

57978719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 53.

The square root of 57978719 is about 7614.3758115817. The cubic root of 57978719 is about 387.0403156704.

The spelling of 57978719 in words is "fifty-seven million, nine hundred seventy-eight thousand, seven hundred nineteen".