13983209 has 2 divisors, whose sum is σ = 13983210. Its totient is φ = 13983208.

The previous prime is 13983169. The next prime is 13983217. The reversal of 13983209 is 90238931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 107584 = 3725^2 + 328^2 .

It is an emirp because it is prime and its reverse (90238931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13983209 - 2¹² = 13979113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13983239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6991604 + 6991605.

It is an arithmetic number, because the mean of its divisors is an integer number (6991605).

Almost surely, 2^13983209 is an apocalyptic number.

It is an amenable number.

13983209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13983209 is an equidigital number, since it uses as much as digits as its factorization.

13983209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 13983209 is about 3739.4129218368. The cubic root of 13983209 is about 240.9178338262.

The spelling of 13983209 in words is "thirteen million, nine hundred eighty-three thousand, two hundred nine".