14891809 has 4 divisors (see below), whose sum is σ = 15208704. Its totient is φ = 14574916.

The previous prime is 14891791. The next prime is 14891837. The reversal of 14891809 is 90819841.

14891809 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 14891809 - 2¹¹ = 14889761 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14891909) 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, 158377 + ... + 158470.

It is an arithmetic number, because the mean of its divisors is an integer number (3802176).

Almost surely, 2^14891809 is an apocalyptic number.

It is an amenable number.

14891809 is a deficient number, since it is larger than the sum of its proper divisors (316895).

14891809 is an equidigital number, since it uses as much as digits as its factorization.

14891809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316894.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 14891809 is about 3858.9906711471. The cubic root of 14891809 is about 246.0268384581.

The spelling of 14891809 in words is "fourteen million, eight hundred ninety-one thousand, eight hundred nine".