565623 has 10 divisors (see below), whose sum is σ = 845064. Its totient is φ = 377028.

The previous prime is 565613. The next prime is 565637. The reversal of 565623 is 326565.

565623 is a `hidden beast` number, since 5 + 656 + 2 + 3 = 666.

565623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 565623 - 2⁶ = 565559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565603) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3411 + ... + 3572.

2⁵⁶⁵⁶²³ is an apocalyptic number.

565623 is a deficient number, since it is larger than the sum of its proper divisors (279441).

565623 is an equidigital number, since it uses as much as digits as its factorization.

565623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6986 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 565623 is about 752.0791181784. The cubic root of 565623 is about 82.7006685338.

It can be divided in two parts, 56562 and 3, that added together give a palindrome (56565).

The spelling of 565623 in words is "five hundred sixty-five thousand, six hundred twenty-three".