13217903609 has 2 divisors, whose sum is σ = 13217903610. Its totient is φ = 13217903608.

The previous prime is 13217903551. The next prime is 13217903627. The reversal of 13217903609 is 90630971231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7090145209 + 6127758400 = 84203^2 + 78280^2 .

It is an emirp because it is prime and its reverse (90630971231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13217903609 - 2⁸ = 13217903353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13217902609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608951804 + 6608951805.

It is an arithmetic number, because the mean of its divisors is an integer number (6608951805).

Almost surely, 2^13217903609 is an apocalyptic number.

It is an amenable number.

13217903609 is a deficient number, since it is larger than the sum of its proper divisors (1).

13217903609 is an equidigital number, since it uses as much as digits as its factorization.

13217903609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The spelling of 13217903609 in words is "thirteen billion, two hundred seventeen million, nine hundred three thousand, six hundred nine".