557857 has 2 divisors, whose sum is σ = 557858. Its totient is φ = 557856.

The previous prime is 557831. The next prime is 557861. The reversal of 557857 is 758755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484416 + 73441 = 696^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 557857 - 2⁷ = 557729 is a prime.

It is a super-2 number, since 2×557857² = 622408864898, which contains 22 as substring.

557857 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278928 + 278929.

It is an arithmetic number, because the mean of its divisors is an integer number (278929).

2⁵⁵⁷⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

557857 is a deficient number, since it is larger than the sum of its proper divisors (1).

557857 is an equidigital number, since it uses as much as digits as its factorization.

557857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49000, while the sum is 37.

The square root of 557857 is about 746.8982527761. The cubic root of 557857 is about 82.3204297538.

The spelling of 557857 in words is "five hundred fifty-seven thousand, eight hundred fifty-seven".