556999 has 2 divisors, whose sum is σ = 557000. Its totient is φ = 556998.

The previous prime is 556987. The next prime is 557017. The reversal of 556999 is 999655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556999 - 2⁵ = 556967 is a prime.

556999 is a modest number, since divided by 999 gives 556 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556939) 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, 278499 + 278500.

It is an arithmetic number, because the mean of its divisors is an integer number (278500).

2⁵⁵⁶⁹⁹⁹ is an apocalyptic number.

556999 is a deficient number, since it is larger than the sum of its proper divisors (1).

556999 is an equidigital number, since it uses as much as digits as its factorization.

556999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109350, while the sum is 43.

The square root of 556999 is about 746.3236563315. The cubic root of 556999 is about 82.2782043744.

The spelling of 556999 in words is "five hundred fifty-six thousand, nine hundred ninety-nine".