57991319 has 2 divisors, whose sum is σ = 57991320. Its totient is φ = 57991318.

The previous prime is 57991259. The next prime is 57991327. The reversal of 57991319 is 91319975.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57991319 is a prime.

It is a super-2 number, since 2×57991319² = 6725986158719522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57991319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57291319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28995659 + 28995660.

It is an arithmetic number, because the mean of its divisors is an integer number (28995660).

Almost surely, 2^57991319 is an apocalyptic number.

57991319 is a deficient number, since it is larger than the sum of its proper divisors (1).

57991319 is an equidigital number, since it uses as much as digits as its factorization.

57991319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76545, while the sum is 44.

The square root of 57991319 is about 7615.2031489646. The cubic root of 57991319 is about 387.0683509842.

The spelling of 57991319 in words is "fifty-seven million, nine hundred ninety-one thousand, three hundred nineteen".