565689 has 4 divisors (see below), whose sum is σ = 754256. Its totient is φ = 377124.

The previous prime is 565667. The next prime is 565723. The reversal of 565689 is 986565.

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 not a de Polignac number, because 565689 - 2⁹ = 565177 is a prime.

It is a super-3 number, since 3×565689³ = 543068304162533307, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (565189) 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, 94279 + ... + 94284.

It is an arithmetic number, because the mean of its divisors is an integer number (188564).

2⁵⁶⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

565689 is a deficient number, since it is larger than the sum of its proper divisors (188567).

565689 is a wasteful number, since it uses less digits than its factorization.

565689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188566.

The product of its digits is 64800, while the sum is 39.

The square root of 565689 is about 752.1229952607. The cubic root of 565689 is about 82.7038850648.

The spelling of 565689 in words is "five hundred sixty-five thousand, six hundred eighty-nine".