14187891 has 4 divisors (see below), whose sum is σ = 18917192. Its totient is φ = 9458592.

The previous prime is 14187881. The next prime is 14187913. The reversal of 14187891 is 19878141.

14187891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 14187891 - 2⁶ = 14187827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14187821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2364646 + ... + 2364651.

It is an arithmetic number, because the mean of its divisors is an integer number (4729298).

Almost surely, 2^14187891 is an apocalyptic number.

14187891 is a deficient number, since it is larger than the sum of its proper divisors (4729301).

14187891 is an equidigital number, since it uses as much as digits as its factorization.

14187891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729300.

The product of its digits is 16128, while the sum is 39.

The square root of 14187891 is about 3766.6816961352. The cubic root of 14187891 is about 242.0876387271.

The spelling of 14187891 in words is "fourteen million, one hundred eighty-seven thousand, eight hundred ninety-one".