22345989 has 4 divisors (see below), whose sum is σ = 29794656. Its totient is φ = 14897324.

The previous prime is 22345969. The next prime is 22345993. The reversal of 22345989 is 98954322.

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 22345989 - 2¹³ = 22337797 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 22345989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22345969) 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, 3724329 + ... + 3724334.

It is an arithmetic number, because the mean of its divisors is an integer number (7448664).

Almost surely, 2^22345989 is an apocalyptic number.

It is an amenable number.

22345989 is a deficient number, since it is larger than the sum of its proper divisors (7448667).

22345989 is an equidigital number, since it uses as much as digits as its factorization.

22345989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7448666.

The product of its digits is 155520, while the sum is 42.

The square root of 22345989 is about 4727.1544294639. The cubic root of 22345989 is about 281.6652004794.

The spelling of 22345989 in words is "twenty-two million, three hundred forty-five thousand, nine hundred eighty-nine".