14218891 has 2 divisors, whose sum is σ = 14218892. Its totient is φ = 14218890.

The previous prime is 14218879. The next prime is 14218927. The reversal of 14218891 is 19881241.

It is a weak prime.

It is an emirp because it is prime and its reverse (19881241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14218891 - 2¹³ = 14210699 is a prime.

It is a super-2 number, since 2×14218891² = 404353722539762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (14218811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7109445 + 7109446.

It is an arithmetic number, because the mean of its divisors is an integer number (7109446).

Almost surely, 2^14218891 is an apocalyptic number.

14218891 is a deficient number, since it is larger than the sum of its proper divisors (1).

14218891 is an equidigital number, since it uses as much as digits as its factorization.

14218891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 34.

The square root of 14218891 is about 3770.7944786212. The cubic root of 14218891 is about 242.2638278823.

The spelling of 14218891 in words is "fourteen million, two hundred eighteen thousand, eight hundred ninety-one".