13331309 has 2 divisors, whose sum is σ = 13331310. Its totient is φ = 13331308.

The previous prime is 13331299. The next prime is 13331411. The reversal of 13331309 is 90313331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 299209 = 3610^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331309 - 2¹⁶ = 13265773 is a prime.

It is a Sophie Germain prime.

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 (13331509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665654 + 6665655.

It is an arithmetic number, because the mean of its divisors is an integer number (6665655).

Almost surely, 2^13331309 is an apocalyptic number.

It is an amenable number.

13331309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331309 is an equidigital number, since it uses as much as digits as its factorization.

13331309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 13331309 is about 3651.2065129214. The cubic root of 13331309 is about 237.1142191292.

The spelling of 13331309 in words is "thirteen million, three hundred thirty-one thousand, three hundred nine".