557993 has 4 divisors (see below), whose sum is σ = 559488. Its totient is φ = 556500.

The previous prime is 557987. The next prime is 558007. The reversal of 557993 is 399755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 557993 - 2¹² = 553897 is a prime.

It is a super-2 number, since 2×557993² = 622712376098, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (557903) 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, 368 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (139872).

2⁵⁵⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

557993 is a deficient number, since it is larger than the sum of its proper divisors (1495).

557993 is an equidigital number, since it uses as much as digits as its factorization.

557993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494.

The product of its digits is 42525, while the sum is 38.

The square root of 557993 is about 746.9892904185. The cubic root of 557993 is about 82.3271188449.

The spelling of 557993 in words is "five hundred fifty-seven thousand, nine hundred ninety-three".