565499989 has 4 divisors (see below), whose sum is σ = 565661920. Its totient is φ = 565338060.

The previous prime is 565499981. The next prime is 565500007. The reversal of 565499989 is 989994565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 565499989 - 2³ = 565499981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 565499989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565499981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75609 + ... + 82750.

It is an arithmetic number, because the mean of its divisors is an integer number (141415480).

Almost surely, 2^565499989 is an apocalyptic number.

It is an amenable number.

565499989 is a deficient number, since it is larger than the sum of its proper divisors (161931).

565499989 is a wasteful number, since it uses less digits than its factorization.

565499989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161930.

The product of its digits is 31492800, while the sum is 64.

The square root of 565499989 is about 23780.2436699038. The cubic root of 565499989 is about 826.9467288561.

The spelling of 565499989 in words is "five hundred sixty-five million, four hundred ninety-nine thousand, nine hundred eighty-nine".