13809223 has 4 divisors (see below), whose sum is σ = 14409648. Its totient is φ = 13208800.

The previous prime is 13809209. The next prime is 13809227. The reversal of 13809223 is 32290831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13809223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13809191 and 13809200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809227) 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, 300178 + ... + 300223.

It is an arithmetic number, because the mean of its divisors is an integer number (3602412).

Almost surely, 2^13809223 is an apocalyptic number.

13809223 is a deficient number, since it is larger than the sum of its proper divisors (600425).

13809223 is an equidigital number, since it uses as much as digits as its factorization.

13809223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600424.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13809223 is about 3716.0762909284. The cubic root of 13809223 is about 239.9144544655.

The spelling of 13809223 in words is "thirteen million, eight hundred nine thousand, two hundred twenty-three".