557760391 has 2 divisors, whose sum is σ = 557760392. Its totient is φ = 557760390.

The previous prime is 557760341. The next prime is 557760397. The reversal of 557760391 is 193067755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557760391 - 2⁷ = 557760263 is a prime.

It is a super-2 number, since 2×557760391² = 622193307536945762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557760397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278880195 + 278880196.

It is an arithmetic number, because the mean of its divisors is an integer number (278880196).

Almost surely, 2^557760391 is an apocalyptic number.

557760391 is a deficient number, since it is larger than the sum of its proper divisors (1).

557760391 is an equidigital number, since it uses as much as digits as its factorization.

557760391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 557760391 is about 23616.9513485547. The cubic root of 557760391 is about 823.1567742868.

The spelling of 557760391 in words is "five hundred fifty-seven million, seven hundred sixty thousand, three hundred ninety-one".