557871989 has 2 divisors, whose sum is σ = 557871990. Its totient is φ = 557871988.

The previous prime is 557871971. The next prime is 557872019. The reversal of 557871989 is 989178755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 530519089 + 27352900 = 23033^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 557871989 - 2⁸ = 557871733 is a prime.

It is a super-2 number, since 2×557871989² = 622442312221632242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557871959) 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 as a sum of consecutive naturals, namely, 278935994 + 278935995.

It is an arithmetic number, because the mean of its divisors is an integer number (278935995).

Almost surely, 2^557871989 is an apocalyptic number.

It is an amenable number.

557871989 is a deficient number, since it is larger than the sum of its proper divisors (1).

557871989 is an equidigital number, since it uses as much as digits as its factorization.

557871989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 59.

The square root of 557871989 is about 23619.3138977406. The cubic root of 557871989 is about 823.2116703348.

The spelling of 557871989 in words is "five hundred fifty-seven million, eight hundred seventy-one thousand, nine hundred eighty-nine".