13617439217 has 2 divisors, whose sum is σ = 13617439218. Its totient is φ = 13617439216.

The previous prime is 13617439153. The next prime is 13617439243. The reversal of 13617439217 is 71293471631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8283912256 + 5333526961 = 91016^2 + 73031^2 .

It is an emirp because it is prime and its reverse (71293471631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13617439217 - 2⁶ = 13617439153 is a prime.

It is not a weakly prime, because it can be changed into another prime (13617430217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6808719608 + 6808719609.

It is an arithmetic number, because the mean of its divisors is an integer number (6808719609).

Almost surely, 2^13617439217 is an apocalyptic number.

It is an amenable number.

13617439217 is a deficient number, since it is larger than the sum of its proper divisors (1).

13617439217 is an equidigital number, since it uses as much as digits as its factorization.

13617439217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The spelling of 13617439217 in words is "thirteen billion, six hundred seventeen million, four hundred thirty-nine thousand, two hundred seventeen".