565889 has 2 divisors, whose sum is σ = 565890. Its totient is φ = 565888.

The previous prime is 565867. The next prime is 565891. The reversal of 565889 is 988565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 87025 = 692^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565889 is a prime.

Together with 565891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (565849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282944 + 282945.

It is an arithmetic number, because the mean of its divisors is an integer number (282945).

2⁵⁶⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

565889 is a deficient number, since it is larger than the sum of its proper divisors (1).

565889 is an equidigital number, since it uses as much as digits as its factorization.

565889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 565889 is about 752.2559404883. The cubic root of 565889 is about 82.7136306011.

The spelling of 565889 in words is "five hundred sixty-five thousand, eight hundred eighty-nine".