22403009 has 2 divisors, whose sum is σ = 22403010. Its totient is φ = 22403008.

The previous prime is 22402999. The next prime is 22403011. The reversal of 22403009 is 90030422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 124609 = 4720^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 22403009 - 2²⁰ = 21354433 is a prime.

It is a Sophie Germain prime.

Together with 22403011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22403039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11201504 + 11201505.

It is an arithmetic number, because the mean of its divisors is an integer number (11201505).

Almost surely, 2^22403009 is an apocalyptic number.

It is an amenable number.

22403009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22403009 is an equidigital number, since it uses as much as digits as its factorization.

22403009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 22403009 is about 4733.1816994491. The cubic root of 22403009 is about 281.9045709329.

The spelling of 22403009 in words is "twenty-two million, four hundred three thousand, nine".