14391681 has 4 divisors (see below), whose sum is σ = 19188912. Its totient is φ = 9594452.

The previous prime is 14391679. The next prime is 14391703. The reversal of 14391681 is 18619341.

14391681 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14391681 - 2¹ = 14391679 is a prime.

It is a super-2 number, since 2×14391681² = 414240964011522, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (14391661) 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, 2398611 + ... + 2398616.

It is an arithmetic number, because the mean of its divisors is an integer number (4797228).

Almost surely, 2^14391681 is an apocalyptic number.

It is an amenable number.

14391681 is a deficient number, since it is larger than the sum of its proper divisors (4797231).

14391681 is an equidigital number, since it uses as much as digits as its factorization.

14391681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797230.

The product of its digits is 5184, while the sum is 33.

The square root of 14391681 is about 3793.6369093523. The cubic root of 14391681 is about 243.2412209478.

The spelling of 14391681 in words is "fourteen million, three hundred ninety-one thousand, six hundred eighty-one".