555993 has 12 divisors (see below), whose sum is σ = 810160. Its totient is φ = 367416.

The previous prime is 555967. The next prime is 556007. The reversal of 555993 is 399555.

It is not a de Polignac number, because 555993 - 2¹⁰ = 554969 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555993.

It is not an unprimeable number, because it can be changed into a prime (555953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1278 + ... + 1656.

2⁵⁵⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

555993 is a deficient number, since it is larger than the sum of its proper divisors (254167).

555993 is a wasteful number, since it uses less digits than its factorization.

555993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 545 counting only the distinct ones).

The product of its digits is 30375, while the sum is 36.

The square root of 555993 is about 745.6493814119. The cubic root of 555993 is about 82.2286400991.

The spelling of 555993 in words is "five hundred fifty-five thousand, nine hundred ninety-three".