12228917 has 2 divisors, whose sum is σ = 12228918. Its totient is φ = 12228916.

The previous prime is 12228901. The next prime is 12228929. The reversal of 12228917 is 71982221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12117361 + 111556 = 3481^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 12228917 - 2⁴ = 12228901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12228017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114458 + 6114459.

It is an arithmetic number, because the mean of its divisors is an integer number (6114459).

Almost surely, 2^12228917 is an apocalyptic number.

It is an amenable number.

12228917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228917 is an equidigital number, since it uses as much as digits as its factorization.

12228917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 12228917 is about 3496.9868458431. The cubic root of 12228917 is about 230.3894912762.

The spelling of 12228917 in words is "twelve million, two hundred twenty-eight thousand, nine hundred seventeen".