609569 has 8 divisors (see below), whose sum is σ = 673920. Its totient is φ = 548416.

The previous prime is 609541. The next prime is 609571. The reversal of 609569 is 965906.

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

It is a cyclic number.

It is not a de Polignac number, because 609569 - 2⁸ = 609313 is a prime.

It is a super-2 number, since 2×609569² = 743148731522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁶⁰⁹⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

609569 is a deficient number, since it is larger than the sum of its proper divisors (64351).

609569 is a wasteful number, since it uses less digits than its factorization.

609569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 609569 is about 780.7489993589. The cubic root of 609569 is about 84.7892819758.

The spelling of 609569 in words is "six hundred nine thousand, five hundred sixty-nine".