12238309 has 2 divisors, whose sum is σ = 12238310. Its totient is φ = 12238308.

The previous prime is 12238297. The next prime is 12238313. The reversal of 12238309 is 90383221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 5189284 = 2655^2 + 2278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12238309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12239309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119154 + 6119155.

It is an arithmetic number, because the mean of its divisors is an integer number (6119155).

Almost surely, 2^12238309 is an apocalyptic number.

It is an amenable number.

12238309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12238309 is an equidigital number, since it uses as much as digits as its factorization.

12238309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12238309 is about 3498.3294584701. The cubic root of 12238309 is about 230.4484570971.

The spelling of 12238309 in words is "twelve million, two hundred thirty-eight thousand, three hundred nine".