557987 has 2 divisors, whose sum is σ = 557988. Its totient is φ = 557986.

The previous prime is 557981. The next prime is 558007. The reversal of 557987 is 789755.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557987 - 2⁸ = 557731 is a prime.

It is a super-2 number, since 2×557987² = 622698984338, which contains 22 as substring.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 557987.

It is not a weakly prime, because it can be changed into another prime (557981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278993 + 278994.

It is an arithmetic number, because the mean of its divisors is an integer number (278994).

2⁵⁵⁷⁹⁸⁷ is an apocalyptic number.

557987 is a deficient number, since it is larger than the sum of its proper divisors (1).

557987 is an equidigital number, since it uses as much as digits as its factorization.

557987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 41.

The square root of 557987 is about 746.9852742859. The cubic root of 557987 is about 82.3268237608.

The spelling of 557987 in words is "five hundred fifty-seven thousand, nine hundred eighty-seven".