22539769 has 4 divisors (see below), whose sum is σ = 25759744. Its totient is φ = 19319796.

The previous prime is 22539761. The next prime is 22539899. The reversal of 22539769 is 96793522.

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 22539769 - 2³ = 22539761 is a prime.

It is a super-2 number, since 2×22539769² = 1016082373146722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22539761) 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, 1609977 + ... + 1609990.

It is an arithmetic number, because the mean of its divisors is an integer number (6439936).

Almost surely, 2^22539769 is an apocalyptic number.

It is an amenable number.

22539769 is a deficient number, since it is larger than the sum of its proper divisors (3219975).

22539769 is an equidigital number, since it uses as much as digits as its factorization.

22539769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219974.

The product of its digits is 204120, while the sum is 43.

The square root of 22539769 is about 4747.6066602026. The cubic root of 22539769 is about 282.4770399279.

The spelling of 22539769 in words is "twenty-two million, five hundred thirty-nine thousand, seven hundred sixty-nine".