22730909 has 2 divisors, whose sum is σ = 22730910. Its totient is φ = 22730908.

The previous prime is 22730899. The next prime is 22730927. The reversal of 22730909 is 90903722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 5508409 = 4150^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 22730909 - 2⁴ = 22730893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22730009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11365454 + 11365455.

It is an arithmetic number, because the mean of its divisors is an integer number (11365455).

Almost surely, 2^22730909 is an apocalyptic number.

It is an amenable number.

22730909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22730909 is an equidigital number, since it uses as much as digits as its factorization.

22730909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 22730909 is about 4767.6943064756. The cubic root of 22730909 is about 283.2732733903.

The spelling of 22730909 in words is "twenty-two million, seven hundred thirty thousand, nine hundred nine".