22723989 has 16 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 14866928.

The previous prime is 22723979. The next prime is 22723997. The reversal of 22723989 is 98932722.

It is a cyclic number.

It is not a de Polignac number, because 22723989 - 2⁴ = 22723973 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22723989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22723949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65314 + ... + 65660.

It is an arithmetic number, because the mean of its divisors is an integer number (1929312).

Almost surely, 2^22723989 is an apocalyptic number.

It is an amenable number.

22723989 is a deficient number, since it is larger than the sum of its proper divisors (8145003).

22723989 is a wasteful number, since it uses less digits than its factorization.

22723989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its digits is 108864, while the sum is 42.

The square root of 22723989 is about 4766.9685335651. The cubic root of 22723989 is about 283.2445247233.

The spelling of 22723989 in words is "twenty-two million, seven hundred twenty-three thousand, nine hundred eighty-nine".