13139651309 has 2 divisors, whose sum is σ = 13139651310. Its totient is φ = 13139651308.

The previous prime is 13139651293. The next prime is 13139651363. The reversal of 13139651309 is 90315693131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9836275684 + 3303375625 = 99178^2 + 57475^2 .

It is an emirp because it is prime and its reverse (90315693131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13139651309 - 2⁴ = 13139651293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13139651009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6569825654 + 6569825655.

It is an arithmetic number, because the mean of its divisors is an integer number (6569825655).

Almost surely, 2^13139651309 is an apocalyptic number.

It is an amenable number.

13139651309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13139651309 is an equidigital number, since it uses as much as digits as its factorization.

13139651309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 41.

The spelling of 13139651309 in words is "thirteen billion, one hundred thirty-nine million, six hundred fifty-one thousand, three hundred nine".