22497789 has 4 divisors (see below), whose sum is σ = 29997056. Its totient is φ = 14998524.

The previous prime is 22497779. The next prime is 22497791. The reversal of 22497789 is 98779422.

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 not a de Polignac number, because 22497789 - 2⁴ = 22497773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22497719) 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, 3749629 + ... + 3749634.

It is an arithmetic number, because the mean of its divisors is an integer number (7499264).

Almost surely, 2^22497789 is an apocalyptic number.

It is an amenable number.

22497789 is a deficient number, since it is larger than the sum of its proper divisors (7499267).

22497789 is an equidigital number, since it uses as much as digits as its factorization.

22497789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499266.

The product of its digits is 508032, while the sum is 48.

The square root of 22497789 is about 4743.1834246632. The cubic root of 22497789 is about 282.3015611140.

The spelling of 22497789 in words is "twenty-two million, four hundred ninety-seven thousand, seven hundred eighty-nine".