13217453449 has 2 divisors, whose sum is σ = 13217453450. Its totient is φ = 13217453448.

The previous prime is 13217453419. The next prime is 13217453503. The reversal of 13217453449 is 94435471231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10659117049 + 2558336400 = 103243^2 + 50580^2 .

It is an emirp because it is prime and its reverse (94435471231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13217453449 - 2⁷ = 13217453321 is a prime.

It is not a weakly prime, because it can be changed into another prime (13217453419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608726724 + 6608726725.

It is an arithmetic number, because the mean of its divisors is an integer number (6608726725).

Almost surely, 2^13217453449 is an apocalyptic number.

It is an amenable number.

13217453449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13217453449 is an equidigital number, since it uses as much as digits as its factorization.

13217453449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The spelling of 13217453449 in words is "thirteen billion, two hundred seventeen million, four hundred fifty-three thousand, four hundred forty-nine".