13931392369 has 2 divisors, whose sum is σ = 13931392370. Its totient is φ = 13931392368.

The previous prime is 13931392313. The next prime is 13931392379. The reversal of 13931392369 is 96329313931.

13931392369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8012398144 + 5918994225 = 89512^2 + 76935^2 .

It is an emirp because it is prime and its reverse (96329313931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13931392369 - 2⁹ = 13931391857 is a prime.

It is a super-2 number, since 2×13931392369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13931392379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965696184 + 6965696185.

It is an arithmetic number, because the mean of its divisors is an integer number (6965696185).

Almost surely, 2^13931392369 is an apocalyptic number.

It is an amenable number.

13931392369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931392369 is an equidigital number, since it uses as much as digits as its factorization.

13931392369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 49.

The spelling of 13931392369 in words is "thirteen billion, nine hundred thirty-one million, three hundred ninety-two thousand, three hundred sixty-nine".