13944728191 has 2 divisors, whose sum is σ = 13944728192. Its totient is φ = 13944728190.

The previous prime is 13944728179. The next prime is 13944728201. The reversal of 13944728191 is 19182744931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13944728191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13944728141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6972364095 + 6972364096.

It is an arithmetic number, because the mean of its divisors is an integer number (6972364096).

Almost surely, 2^13944728191 is an apocalyptic number.

13944728191 is a deficient number, since it is larger than the sum of its proper divisors (1).

13944728191 is an equidigital number, since it uses as much as digits as its factorization.

13944728191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The spelling of 13944728191 in words is "thirteen billion, nine hundred forty-four million, seven hundred twenty-eight thousand, one hundred ninety-one".