13284209 has 4 divisors (see below), whose sum is σ = 13292916. Its totient is φ = 13275504.

The previous prime is 13284199. The next prime is 13284217. The reversal of 13284209 is 90248231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90248231 = 1567 ⋅57593.

It can be written as a sum of positive squares in 2 ways, for example, as 9284209 + 4000000 = 3047^2 + 2000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13284209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13284289) 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, 1394 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (3323229).

Almost surely, 2^13284209 is an apocalyptic number.

It is an amenable number.

13284209 is a deficient number, since it is larger than the sum of its proper divisors (8707).

13284209 is an equidigital number, since it uses as much as digits as its factorization.

13284209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8706.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13284209 is about 3644.7508831194. The cubic root of 13284209 is about 236.8346452326.

The spelling of 13284209 in words is "thirteen million, two hundred eighty-four thousand, two hundred nine".