13287266309 has 2 divisors, whose sum is σ = 13287266310. Its totient is φ = 13287266308.

The previous prime is 13287266297. The next prime is 13287266353. The reversal of 13287266309 is 90366278231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7152930625 + 6134335684 = 84575^2 + 78322^2 .

It is an emirp because it is prime and its reverse (90366278231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13287266309 is a prime.

It is a Sophie Germain 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 (13287266389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643633154 + 6643633155.

It is an arithmetic number, because the mean of its divisors is an integer number (6643633155).

Almost surely, 2^13287266309 is an apocalyptic number.

It is an amenable number.

13287266309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13287266309 is an equidigital number, since it uses as much as digits as its factorization.

13287266309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 13287266309 in words is "thirteen billion, two hundred eighty-seven million, two hundred sixty-six thousand, three hundred nine".