12909313 has 2 divisors, whose sum is σ = 12909314. Its totient is φ = 12909312.

The previous prime is 12909283. The next prime is 12909319. The reversal of 12909313 is 31390921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7091569 + 5817744 = 2663^2 + 2412^2 .

It is an emirp because it is prime and its reverse (31390921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12909313 is a prime.

It is not a weakly prime, because it can be changed into another prime (12909319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454656 + 6454657.

It is an arithmetic number, because the mean of its divisors is an integer number (6454657).

Almost surely, 2^12909313 is an apocalyptic number.

It is an amenable number.

12909313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12909313 is an equidigital number, since it uses as much as digits as its factorization.

12909313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 12909313 is about 3592.9532421116. The cubic root of 12909313 is about 234.5854347783.

The spelling of 12909313 in words is "twelve million, nine hundred nine thousand, three hundred thirteen".