565989 has 8 divisors (see below), whose sum is σ = 775200. Its totient is φ = 367056.

The previous prime is 565979. The next prime is 565997. The reversal of 565989 is 989565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 565989 - 2⁴ = 565973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 565989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439 + ... + 2660.

It is an arithmetic number, because the mean of its divisors is an integer number (96900).

2⁵⁶⁵⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

565989 is a deficient number, since it is larger than the sum of its proper divisors (209211).

565989 is a wasteful number, since it uses less digits than its factorization.

565989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139.

The product of its digits is 97200, while the sum is 42.

The square root of 565989 is about 752.3224042922. The cubic root of 565989 is about 82.7185025082.

The spelling of 565989 in words is "five hundred sixty-five thousand, nine hundred eighty-nine".