565983 has 12 divisors (see below), whose sum is σ = 892008. Its totient is φ = 342960.

The previous prime is 565979. The next prime is 565997. The reversal of 565983 is 389565.

565983 is a `hidden beast` number, since 565 + 98 + 3 = 666.

It is not a de Polignac number, because 565983 - 2² = 565979 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2760 + ... + 2957.

It is an arithmetic number, because the mean of its divisors is an integer number (74334).

2⁵⁶⁵⁹⁸³ is an apocalyptic number.

565983 is a deficient number, since it is larger than the sum of its proper divisors (326025).

565983 is a wasteful number, since it uses less digits than its factorization.

565983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734 (or 5731 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 565983 is about 752.3184166296. The cubic root of 565983 is about 82.7182102100.

The spelling of 565983 in words is "five hundred sixty-five thousand, nine hundred eighty-three".