12227909 has 2 divisors, whose sum is σ = 12227910. Its totient is φ = 12227908.

The previous prime is 12227903. The next prime is 12227911. The reversal of 12227909 is 90972221.

12227909 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7963684 + 4264225 = 2822^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 12227909 - 2⁴ = 12227893 is a prime.

It is a Sophie Germain prime.

Together with 12227911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12227903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113954 + 6113955.

It is an arithmetic number, because the mean of its divisors is an integer number (6113955).

Almost surely, 2^12227909 is an apocalyptic number.

It is an amenable number.

12227909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12227909 is an equidigital number, since it uses as much as digits as its factorization.

12227909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12227909 is about 3496.8427187965. The cubic root of 12227909 is about 230.3831609531.

The spelling of 12227909 in words is "twelve million, two hundred twenty-seven thousand, nine hundred nine".