557082991 has 4 divisors (see below), whose sum is σ = 557130312. Its totient is φ = 557035672.

The previous prime is 557082961. The next prime is 557082997. The reversal of 557082991 is 199280755.

557082991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 199280755 = 5 ⋅39856151.

It is a cyclic number.

It is not a de Polignac number, because 557082991 - 2⁵ = 557082959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557082997) 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, 9360 + ... + 34666.

It is an arithmetic number, because the mean of its divisors is an integer number (139282578).

Almost surely, 2^557082991 is an apocalyptic number.

557082991 is a deficient number, since it is larger than the sum of its proper divisors (47321).

557082991 is a wasteful number, since it uses less digits than its factorization.

557082991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47320.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 557082991 is about 23602.6055976877. The cubic root of 557082991 is about 822.8233979852.

The spelling of 557082991 in words is "five hundred fifty-seven million, eighty-two thousand, nine hundred ninety-one".