13891271 has 2 divisors, whose sum is σ = 13891272. Its totient is φ = 13891270.

The previous prime is 13891259. The next prime is 13891289. The reversal of 13891271 is 17219831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13891271 - 2¹⁸ = 13629127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13891211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6945635 + 6945636.

It is an arithmetic number, because the mean of its divisors is an integer number (6945636).

Almost surely, 2^13891271 is an apocalyptic number.

13891271 is a deficient number, since it is larger than the sum of its proper divisors (1).

13891271 is an equidigital number, since it uses as much as digits as its factorization.

13891271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 13891271 is about 3727.0995425397. The cubic root of 13891271 is about 240.3886699939.

The spelling of 13891271 in words is "thirteen million, eight hundred ninety-one thousand, two hundred seventy-one".