13444400317 has 2 divisors, whose sum is σ = 13444400318. Its totient is φ = 13444400316.

The previous prime is 13444400303. The next prime is 13444400329. The reversal of 13444400317 is 71300444431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7144644676 + 6299755641 = 84526^2 + 79371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13444400317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13444400017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722200158 + 6722200159.

It is an arithmetic number, because the mean of its divisors is an integer number (6722200159).

Almost surely, 2^13444400317 is an apocalyptic number.

It is an amenable number.

13444400317 is a deficient number, since it is larger than the sum of its proper divisors (1).

13444400317 is an equidigital number, since it uses as much as digits as its factorization.

13444400317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 13444400317 its reverse (71300444431), we get a palindrome (84744844748).

The spelling of 13444400317 in words is "thirteen billion, four hundred forty-four million, four hundred thousand, three hundred seventeen".