13443440317 has 2 divisors, whose sum is σ = 13443440318. Its totient is φ = 13443440316.

The previous prime is 13443440279. The next prime is 13443440323. The reversal of 13443440317 is 71304434431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12936560121 + 506880196 = 113739^2 + 22514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13443440317 - 2⁷ = 13443440189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13443443317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6721720158 + 6721720159.

It is an arithmetic number, because the mean of its divisors is an integer number (6721720159).

Almost surely, 2^13443440317 is an apocalyptic number.

It is an amenable number.

13443440317 is a deficient number, since it is larger than the sum of its proper divisors (1).

13443440317 is an equidigital number, since it uses as much as digits as its factorization.

13443440317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 34.

Adding to 13443440317 its reverse (71304434431), we get a palindrome (84747874748).

The spelling of 13443440317 in words is "thirteen billion, four hundred forty-three million, four hundred forty thousand, three hundred seventeen".