11804209 has 2 divisors, whose sum is σ = 11804210. Its totient is φ = 11804208.

The previous prime is 11804207. The next prime is 11804249. The reversal of 11804209 is 90240811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 2471184 = 3055^2 + 1572^2 .

It is a cyclic number.

It is not a de Polignac number, because 11804209 - 2¹ = 11804207 is a prime.

Together with 11804207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11804201) 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 as a sum of consecutive naturals, namely, 5902104 + 5902105.

It is an arithmetic number, because the mean of its divisors is an integer number (5902105).

Almost surely, 2^11804209 is an apocalyptic number.

It is an amenable number.

11804209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11804209 is an equidigital number, since it uses as much as digits as its factorization.

11804209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11804209 is about 3435.7253964774. The cubic root of 11804209 is about 227.6908771198.

The spelling of 11804209 in words is "eleven million, eight hundred four thousand, two hundred nine".