569898989 has 6 divisors (see below), whose sum is σ = 626418030. Its totient is φ = 518089880.

The previous prime is 569898971. The next prime is 569899003. The reversal of 569898989 is 989898965.

It can be written as a sum of positive squares in only one way, i.e., 544848964 + 25050025 = 23342^2 + 5005^2 .

It is not a de Polignac number, because 569898989 - 2²⁴ = 553121773 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (569898949) 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, 2354834 + ... + 2355075.

It is an arithmetic number, because the mean of its divisors is an integer number (104403005).

Almost surely, 2^569898989 is an apocalyptic number.

It is an amenable number.

569898989 is a deficient number, since it is larger than the sum of its proper divisors (56519041).

569898989 is a wasteful number, since it uses less digits than its factorization.

569898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709931 (or 4709920 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 71.

The square root of 569898989 is about 23872.5572362912. The cubic root of 569898989 is about 829.0854536902.

The spelling of 569898989 in words is "five hundred sixty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".