13897804169 has 2 divisors, whose sum is σ = 13897804170. Its totient is φ = 13897804168.

The previous prime is 13897804159. The next prime is 13897804187. The reversal of 13897804169 is 96140879831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10860140944 + 3037663225 = 104212^2 + 55115^2 .

It is an emirp because it is prime and its reverse (96140879831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13897804169 is a prime.

It is a super-2 number, since 2×13897804169² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13897804139) 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, 6948902084 + 6948902085.

It is an arithmetic number, because the mean of its divisors is an integer number (6948902085).

Almost surely, 2^13897804169 is an apocalyptic number.

It is an amenable number.

13897804169 is a deficient number, since it is larger than the sum of its proper divisors (1).

13897804169 is an equidigital number, since it uses as much as digits as its factorization.

13897804169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 13897804169 in words is "thirteen billion, eight hundred ninety-seven million, eight hundred four thousand, one hundred sixty-nine".