557647993 has 8 divisors (see below), whose sum is σ = 640650240. Its totient is φ = 475480320.

The previous prime is 557647943. The next prime is 557648009. The reversal of 557647993 is 399746755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-557647993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557647913) 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 in 7 ways as a sum of consecutive naturals, for example, 207208 + ... + 209881.

It is an arithmetic number, because the mean of its divisors is an integer number (80081280).

Almost surely, 2^557647993 is an apocalyptic number.

It is an amenable number.

557647993 is a deficient number, since it is larger than the sum of its proper divisors (83002247).

557647993 is a wasteful number, since it uses less digits than its factorization.

557647993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417287.

The product of its digits is 7144200, while the sum is 55.

The square root of 557647993 is about 23614.5716243171. The cubic root of 557647993 is about 823.1014773097.

The spelling of 557647993 in words is "five hundred fifty-seven million, six hundred forty-seven thousand, nine hundred ninety-three".