13358209 has 4 divisors (see below), whose sum is σ = 14144004. Its totient is φ = 12572416.

The previous prime is 13358129. The next prime is 13358227. The reversal of 13358209 is 90285331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90285331 = 131 ⋅689201.

It can be written as a sum of positive squares in 2 ways, for example, as 9641025 + 3717184 = 3105^2 + 1928^2 .

It is a cyclic number.

It is not a de Polignac number, because 13358209 - 2⁹ = 13357697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13353209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392872 + ... + 392905.

It is an arithmetic number, because the mean of its divisors is an integer number (3536001).

Almost surely, 2^13358209 is an apocalyptic number.

It is an amenable number.

13358209 is a deficient number, since it is larger than the sum of its proper divisors (785795).

13358209 is an equidigital number, since it uses as much as digits as its factorization.

13358209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785794.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 13358209 is about 3654.8883703883. Note that the first 3 decimals coincide. The cubic root of 13358209 is about 237.2735955062.

The spelling of 13358209 in words is "thirteen million, three hundred fifty-eight thousand, two hundred nine".