13897394571727 has 2 divisors, whose sum is σ = 13897394571728. Its totient is φ = 13897394571726.

The previous prime is 13897394571691. The next prime is 13897394571761. The reversal of 13897394571727 is 72717549379831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13897394571727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13897394571727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13897394571527) 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, 6948697285863 + 6948697285864.

It is an arithmetic number, because the mean of its divisors is an integer number (6948697285864).

Almost surely, 2^{13897394571727} is an apocalyptic number.

13897394571727 is a deficient number, since it is larger than the sum of its proper divisors (1).

13897394571727 is an equidigital number, since it uses as much as digits as its factorization.

13897394571727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560105280, while the sum is 73.

The spelling of 13897394571727 in words is "thirteen trillion, eight hundred ninety-seven billion, three hundred ninety-four million, five hundred seventy-one thousand, seven hundred twenty-seven".