556859 has 2 divisors, whose sum is σ = 556860. Its totient is φ = 556858.

The previous prime is 556849. The next prime is 556861. The reversal of 556859 is 958655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556859 is a prime.

It is a super-3 number, since 3×556859³ = 518032472674043337, which contains 333 as substring.

It is a Sophie Germain prime.

Together with 556861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278429 + 278430.

It is an arithmetic number, because the mean of its divisors is an integer number (278430).

2⁵⁵⁶⁸⁵⁹ is an apocalyptic number.

556859 is a deficient number, since it is larger than the sum of its proper divisors (1).

556859 is an equidigital number, since it uses as much as digits as its factorization.

556859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 38.

The square root of 556859 is about 746.2298573496. The cubic root of 556859 is about 82.2713103382.

The spelling of 556859 in words is "five hundred fifty-six thousand, eight hundred fifty-nine".