11700209 has 2 divisors, whose sum is σ = 11700210. Its totient is φ = 11700208.

The previous prime is 11700197. The next prime is 11700217. The reversal of 11700209 is 90200711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6615184 + 5085025 = 2572^2 + 2255^2 .

It is an emirp because it is prime and its reverse (90200711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11700209 - 2⁴ = 11700193 is a prime.

It is not a weakly prime, because it can be changed into another prime (11700289) 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 as a sum of consecutive naturals, namely, 5850104 + 5850105.

It is an arithmetic number, because the mean of its divisors is an integer number (5850105).

Almost surely, 2^11700209 is an apocalyptic number.

It is an amenable number.

11700209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11700209 is an equidigital number, since it uses as much as digits as its factorization.

11700209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 11700209 is about 3420.5568260153. The cubic root of 11700209 is about 227.0202198217.

The spelling of 11700209 in words is "eleven million, seven hundred thousand, two hundred nine".