14639809 has 4 divisors (see below), whose sum is σ = 15144660. Its totient is φ = 14134960.

The previous prime is 14639803. The next prime is 14639837. The reversal of 14639809 is 90893641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90893641 = 1117 ⋅81373.

It can be written as a sum of positive squares in 2 ways, for example, as 9363600 + 5276209 = 3060^2 + 2297^2 .

It is a cyclic number.

It is not a de Polignac number, because 14639809 - 2¹⁷ = 14508737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14639803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252382 + ... + 252439.

It is an arithmetic number, because the mean of its divisors is an integer number (3786165).

Almost surely, 2^14639809 is an apocalyptic number.

It is an amenable number.

14639809 is a deficient number, since it is larger than the sum of its proper divisors (504851).

14639809 is an equidigital number, since it uses as much as digits as its factorization.

14639809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504850.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 14639809 is about 3826.2003345356. The cubic root of 14639809 is about 244.6311762734.

The spelling of 14639809 in words is "fourteen million, six hundred thirty-nine thousand, eight hundred nine".