14197809 has 4 divisors (see below), whose sum is σ = 18930416. Its totient is φ = 9465204.

The previous prime is 14197759. The next prime is 14197837. The reversal of 14197809 is 90879141.

It is a happy number.

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 not a de Polignac number, because 14197809 - 2⁷ = 14197681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14197879) 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, 2366299 + ... + 2366304.

It is an arithmetic number, because the mean of its divisors is an integer number (4732604).

Almost surely, 2^14197809 is an apocalyptic number.

It is an amenable number.

14197809 is a deficient number, since it is larger than the sum of its proper divisors (4732607).

14197809 is an equidigital number, since it uses as much as digits as its factorization.

14197809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732606.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 14197809 is about 3767.9980095536. The cubic root of 14197809 is about 242.1440357853.

The spelling of 14197809 in words is "fourteen million, one hundred ninety-seven thousand, eight hundred nine".