13617439243 has 2 divisors, whose sum is σ = 13617439244. Its totient is φ = 13617439242.

The previous prime is 13617439217. The next prime is 13617439261. The reversal of 13617439243 is 34293471631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13617439243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13617439243.

It is not a weakly prime, because it can be changed into another prime (13617439273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6808719621 + 6808719622.

It is an arithmetic number, because the mean of its divisors is an integer number (6808719622).

Almost surely, 2^13617439243 is an apocalyptic number.

13617439243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13617439243 is an equidigital number, since it uses as much as digits as its factorization.

13617439243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The spelling of 13617439243 in words is "thirteen billion, six hundred seventeen million, four hundred thirty-nine thousand, two hundred forty-three".