557709491 has 4 divisors (see below), whose sum is σ = 559181400. Its totient is φ = 556237584.

The previous prime is 557709487. The next prime is 557709521. The reversal of 557709491 is 194907755.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557709491 - 2² = 557709487 is a prime.

It is a super-2 number, since 2×557709491² = 622079752702958162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557709421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735386 + ... + 736143.

It is an arithmetic number, because the mean of its divisors is an integer number (139795350).

Almost surely, 2^557709491 is an apocalyptic number.

557709491 is a deficient number, since it is larger than the sum of its proper divisors (1471909).

557709491 is a wasteful number, since it uses less digits than its factorization.

557709491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471908.

The product of its (nonzero) digits is 396900, while the sum is 47.

The square root of 557709491 is about 23615.8737081650. The cubic root of 557709491 is about 823.1317336928.

The spelling of 557709491 in words is "five hundred fifty-seven million, seven hundred nine thousand, four hundred ninety-one".