22609 has 4 divisors (see below), whose sum is σ = 23616. Its totient is φ = 21604.

The previous prime is 22573. The next prime is 22613. The reversal of 22609 is 90622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22609 - 2⁷ = 22481 is a prime.

It is a super-2 number, since 2×22609² = 1022333762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469 + ... + 514.

It is an arithmetic number, because the mean of its divisors is an integer number (5904).

2²²⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

22609 is a deficient number, since it is larger than the sum of its proper divisors (1007).

22609 is an equidigital number, since it uses as much as digits as its factorization.

22609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 22609 is about 150.3628943589. The cubic root of 22609 is about 28.2765954154.

The spelling of 22609 in words is "twenty-two thousand, six hundred nine".