9996209 has 2 divisors, whose sum is σ = 9996210. Its totient is φ = 9996208.

The previous prime is 9996157. The next prime is 9996211. The reversal of 9996209 is 9026999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 10609 = 3160^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 9996209 - 2¹² = 9992113 is a prime.

It is a Sophie Germain prime.

Together with 9996211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9996209.

It is not a weakly prime, because it can be changed into another prime (9996509) 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, 4998104 + 4998105.

It is an arithmetic number, because the mean of its divisors is an integer number (4998105).

Almost surely, 2^9996209 is an apocalyptic number.

It is an amenable number.

9996209 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996209 is an equidigital number, since it uses as much as digits as its factorization.

9996209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 9996209 is about 3161.6781936181. The cubic root of 9996209 is about 215.4162406891.

The spelling of 9996209 in words is "nine million, nine hundred ninety-six thousand, two hundred nine".