13994271397 has 2 divisors, whose sum is σ = 13994271398. Its totient is φ = 13994271396.

The previous prime is 13994271311. The next prime is 13994271427. The reversal of 13994271397 is 79317249931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7487267841 + 6507003556 = 86529^2 + 80666^2 .

It is a cyclic number.

It is not a de Polignac number, because 13994271397 - 2¹¹ = 13994269349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13994275397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6997135698 + 6997135699.

It is an arithmetic number, because the mean of its divisors is an integer number (6997135699).

Almost surely, 2^13994271397 is an apocalyptic number.

It is an amenable number.

13994271397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13994271397 is an equidigital number, since it uses as much as digits as its factorization.

13994271397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The spelling of 13994271397 in words is "thirteen billion, nine hundred ninety-four million, two hundred seventy-one thousand, three hundred ninety-seven".