609565 has 8 divisors (see below), whose sum is σ = 798048. Its totient is φ = 443280.

The previous prime is 609541. The next prime is 609571. The reversal of 609565 is 565906.

It is a happy number.

609565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 609565 - 2⁵ = 609533 is a prime.

It is a Duffinian number.

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 609565.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5487 + ... + 5596.

It is an arithmetic number, because the mean of its divisors is an integer number (99756).

2⁶⁰⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

609565 is a deficient number, since it is larger than the sum of its proper divisors (188483).

609565 is a wasteful number, since it uses less digits than its factorization.

609565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11099.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 609565 is about 780.7464377120. The cubic root of 609565 is about 84.7890965125.

The spelling of 609565 in words is "six hundred nine thousand, five hundred sixty-five".