22998209 has 4 divisors (see below), whose sum is σ = 24767316. Its totient is φ = 21229104.

The previous prime is 22998203. The next prime is 22998233. The reversal of 22998209 is 90289922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 908209 + 22090000 = 953^2 + 4700^2 .

It is not a de Polignac number, because 22998209 - 2⁴ = 22998193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22998203) 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, 884534 + ... + 884559.

It is an arithmetic number, because the mean of its divisors is an integer number (6191829).

Almost surely, 2^22998209 is an apocalyptic number.

It is an amenable number.

22998209 is a deficient number, since it is larger than the sum of its proper divisors (1769107).

22998209 is a wasteful number, since it uses less digits than its factorization.

22998209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769106.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 22998209 is about 4795.6447950197. The cubic root of 22998209 is about 284.3793161040.

The spelling of 22998209 in words is "twenty-two million, nine hundred ninety-eight thousand, two hundred nine".