13999602209 has 2 divisors, whose sum is σ = 13999602210. Its totient is φ = 13999602208.

The previous prime is 13999602203. The next prime is 13999602247. The reversal of 13999602209 is 90220699931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13993707025 + 5895184 = 118295^2 + 2428^2 .

It is an emirp because it is prime and its reverse (90220699931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13999602209 - 2⁴ = 13999602193 is a prime.

It is not a weakly prime, because it can be changed into another prime (13999602203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6999801104 + 6999801105.

It is an arithmetic number, because the mean of its divisors is an integer number (6999801105).

Almost surely, 2^13999602209 is an apocalyptic number.

It is an amenable number.

13999602209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13999602209 is an equidigital number, since it uses as much as digits as its factorization.

13999602209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 13999602209 in words is "thirteen billion, nine hundred ninety-nine million, six hundred two thousand, two hundred nine".