13999171 has 2 divisors, whose sum is σ = 13999172. Its totient is φ = 13999170.

The previous prime is 13999169. The next prime is 13999189. The reversal of 13999171 is 17199931.

13999171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13999171 - 2¹ = 13999169 is a prime.

Together with 13999169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13999121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6999585 + 6999586.

It is an arithmetic number, because the mean of its divisors is an integer number (6999586).

Almost surely, 2^13999171 is an apocalyptic number.

13999171 is a deficient number, since it is larger than the sum of its proper divisors (1).

13999171 is an equidigital number, since it uses as much as digits as its factorization.

13999171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309, while the sum is 40.

The square root of 13999171 is about 3741.5466053492. The cubic root of 13999171 is about 241.0094691619.

The spelling of 13999171 in words is "thirteen million, nine hundred ninety-nine thousand, one hundred seventy-one".