557939 has 4 divisors (see below), whose sum is σ = 565656. Its totient is φ = 550224.

The previous prime is 557927. The next prime is 557981. The reversal of 557939 is 939755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939755 = 5 ⋅187951.

It is a cyclic number.

It is not a de Polignac number, because 557939 - 2¹⁶ = 492403 is a prime.

It is a super-2 number, since 2×557939² = 622591855442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557339) 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, 3749 + ... + 3894.

It is an arithmetic number, because the mean of its divisors is an integer number (141414).

2⁵⁵⁷⁹³⁹ is an apocalyptic number.

557939 is a deficient number, since it is larger than the sum of its proper divisors (7717).

557939 is an equidigital number, since it uses as much as digits as its factorization.

557939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7716.

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

The square root of 557939 is about 746.9531444475. The cubic root of 557939 is about 82.3244630124.

It can be divided in two parts, 55 and 7939, that multiplied together give a triangular number (436645 = T₉₃₄).

The spelling of 557939 in words is "five hundred fifty-seven thousand, nine hundred thirty-nine".