12239309 has 2 divisors, whose sum is σ = 12239310. Its totient is φ = 12239308.

The previous prime is 12239273. The next prime is 12239321. The reversal of 12239309 is 90393221.

12239309 is digitally balanced in base 3, because in such base 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., 6646084 + 5593225 = 2578^2 + 2365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12239309 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 (12239329) 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, 6119654 + 6119655.

It is an arithmetic number, because the mean of its divisors is an integer number (6119655).

Almost surely, 2^12239309 is an apocalyptic number.

It is an amenable number.

12239309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12239309 is an equidigital number, since it uses as much as digits as its factorization.

12239309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 12239309 is about 3498.4723809114. The cubic root of 12239309 is about 230.4547336227.

The spelling of 12239309 in words is "twelve million, two hundred thirty-nine thousand, three hundred nine".