557687 has 4 divisors (see below), whose sum is σ = 600600. Its totient is φ = 514776.

The previous prime is 557671. The next prime is 557693. The reversal of 557687 is 786755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786755 = 5 ⋅157351.

It is a cyclic number.

It is not a de Polignac number, because 557687 - 2⁴ = 557671 is a prime.

It is a super-2 number, since 2×557687² = 622029579938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 557687.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 557687.

It is not an unprimeable number, because it can be changed into a prime (557087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21437 + ... + 21462.

It is an arithmetic number, because the mean of its divisors is an integer number (150150).

2⁵⁵⁷⁶⁸⁷ is an apocalyptic number.

557687 is a deficient number, since it is larger than the sum of its proper divisors (42913).

557687 is a wasteful number, since it uses less digits than its factorization.

557687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42912.

The product of its digits is 58800, while the sum is 38.

The square root of 557687 is about 746.7844401164. The cubic root of 557687 is about 82.3120668610.

The spelling of 557687 in words is "five hundred fifty-seven thousand, six hundred eighty-seven".