14686809 has 4 divisors (see below), whose sum is σ = 19582416. Its totient is φ = 9791204.

The previous prime is 14686799. The next prime is 14686813. The reversal of 14686809 is 90868641.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90868641 = 3 ⋅30289547.

It is a cyclic number.

It is not a de Polignac number, because 14686809 - 2¹⁹ = 14162521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14686849) 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, 2447799 + ... + 2447804.

It is an arithmetic number, because the mean of its divisors is an integer number (4895604).

Almost surely, 2^14686809 is an apocalyptic number.

It is an amenable number.

14686809 is a deficient number, since it is larger than the sum of its proper divisors (4895607).

14686809 is an equidigital number, since it uses as much as digits as its factorization.

14686809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895606.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 14686809 is about 3832.3372763889. The cubic root of 14686809 is about 244.8926865853.

The spelling of 14686809 in words is "fourteen million, six hundred eighty-six thousand, eight hundred nine".