557287889 has 2 divisors, whose sum is σ = 557287890. Its totient is φ = 557287888.

The previous prime is 557287849. The next prime is 557287891. The reversal of 557287889 is 988782755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543262864 + 14025025 = 23308^2 + 3745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557287889 is a prime.

It is a Sophie Germain prime.

Together with 557287891, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (557287849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278643944 + 278643945.

It is an arithmetic number, because the mean of its divisors is an integer number (278643945).

Almost surely, 2^557287889 is an apocalyptic number.

It is an amenable number.

557287889 is a deficient number, since it is larger than the sum of its proper divisors (1).

557287889 is an equidigital number, since it uses as much as digits as its factorization.

557287889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11289600, while the sum is 59.

The square root of 557287889 is about 23606.9457787322. The cubic root of 557287889 is about 822.9242651842.

The spelling of 557287889 in words is "five hundred fifty-seven million, two hundred eighty-seven thousand, eight hundred eighty-nine".