557945389 has 4 divisors (see below), whose sum is σ = 590765724. Its totient is φ = 525125056.

The previous prime is 557945387. The next prime is 557945441. The reversal of 557945389 is 983549755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983549755 = 5 ⋅196709951.

It can be written as a sum of positive squares in 2 ways, for example, as 382515364 + 175430025 = 19558^2 + 13245^2 .

It is a cyclic number.

It is not a de Polignac number, because 557945389 - 2¹ = 557945387 is a prime.

It is a super-2 number, since 2×557945389² = 622606114212722642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557945383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16410142 + ... + 16410175.

It is an arithmetic number, because the mean of its divisors is an integer number (147691431).

Almost surely, 2^557945389 is an apocalyptic number.

It is an amenable number.

557945389 is a deficient number, since it is larger than the sum of its proper divisors (32820335).

557945389 is a wasteful number, since it uses less digits than its factorization.

557945389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820334.

The product of its digits is 6804000, while the sum is 55.

The square root of 557945389 is about 23620.8676597622. The cubic root of 557945389 is about 823.2477724562.

The spelling of 557945389 in words is "five hundred fifty-seven million, nine hundred forty-five thousand, three hundred eighty-nine".