565109 has 2 divisors, whose sum is σ = 565110. Its totient is φ = 565108.

The previous prime is 565069. The next prime is 565111. The reversal of 565109 is 901565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 61009 = 710^2 + 247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565109 is a prime.

Together with 565111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565109.

It is not a weakly prime, because it can be changed into another prime (565189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282554 + 282555.

It is an arithmetic number, because the mean of its divisors is an integer number (282555).

2⁵⁶⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

565109 is a deficient number, since it is larger than the sum of its proper divisors (1).

565109 is an equidigital number, since it uses as much as digits as its factorization.

565109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 565109 is about 751.7373211435. The cubic root of 565109 is about 82.6756100135.

The spelling of 565109 in words is "five hundred sixty-five thousand, one hundred nine".