557891 has 2 divisors, whose sum is σ = 557892. Its totient is φ = 557890.

The previous prime is 557863. The next prime is 557899. The reversal of 557891 is 198755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557891 - 2¹⁰ = 556867 is a prime.

It is a super-2 number, since 2×557891² = 622484735762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (557899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278945 + 278946.

It is an arithmetic number, because the mean of its divisors is an integer number (278946).

2⁵⁵⁷⁸⁹¹ is an apocalyptic number.

557891 is a deficient number, since it is larger than the sum of its proper divisors (1).

557891 is an equidigital number, since it uses as much as digits as its factorization.

557891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 35.

The square root of 557891 is about 746.9210132270. The cubic root of 557891 is about 82.3221021285.

The spelling of 557891 in words is "five hundred fifty-seven thousand, eight hundred ninety-one".