659910889 has 6 divisors (see below), whose sum is σ = 725356730. Its totient is φ = 599918880.

The previous prime is 659910883. The next prime is 659910893. The reversal of 659910889 is 988019956.

It can be written as a sum of positive squares in only one way, i.e., 655769664 + 4141225 = 25608^2 + 2035^2 .

It is not a de Polignac number, because 659910889 - 2⁷ = 659910761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659910883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2726784 + ... + 2727025.

Almost surely, 2^659910889 is an apocalyptic number.

It is an amenable number.

659910889 is a deficient number, since it is larger than the sum of its proper divisors (65445841).

659910889 is a wasteful number, since it uses less digits than its factorization.

659910889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453831 (or 5453820 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 659910889 is about 25688.7307783004. The cubic root of 659910889 is about 870.6195828721.

The spelling of 659910889 in words is "six hundred fifty-nine million, nine hundred ten thousand, eight hundred eighty-nine".