12368309 has 2 divisors, whose sum is σ = 12368310. Its totient is φ = 12368308.

The previous prime is 12368281. The next prime is 12368311. The reversal of 12368309 is 90386321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8720209 + 3648100 = 2953^2 + 1910^2 .

It is an emirp because it is prime and its reverse (90386321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12368309 - 2⁸ = 12368053 is a prime.

It is a Sophie Germain prime.

Together with 12368311, 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 (12368329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6184154 + 6184155.

It is an arithmetic number, because the mean of its divisors is an integer number (6184155).

Almost surely, 2^12368309 is an apocalyptic number.

It is an amenable number.

12368309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12368309 is an equidigital number, since it uses as much as digits as its factorization.

12368309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12368309 is about 3516.8606739534. The cubic root of 12368309 is about 231.2615554002.

The spelling of 12368309 in words is "twelve million, three hundred sixty-eight thousand, three hundred nine".