13949522369 has 2 divisors, whose sum is σ = 13949522370. Its totient is φ = 13949522368.

The previous prime is 13949522339. The next prime is 13949522381. The reversal of 13949522369 is 96322594931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12613985344 + 1335537025 = 112312^2 + 36545^2 .

It is a cyclic number.

It is not a de Polignac number, because 13949522369 - 2²⁴ = 13932745153 is a prime.

It is a super-2 number, since 2×13949522369² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13949522369.

It is not a weakly prime, because it can be changed into another prime (13949522339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6974761184 + 6974761185.

It is an arithmetic number, because the mean of its divisors is an integer number (6974761185).

Almost surely, 2^13949522369 is an apocalyptic number.

It is an amenable number.

13949522369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13949522369 is an equidigital number, since it uses as much as digits as its factorization.

13949522369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 53.

The spelling of 13949522369 in words is "thirteen billion, nine hundred forty-nine million, five hundred twenty-two thousand, three hundred sixty-nine".