9906824209 has 2 divisors, whose sum is σ = 9906824210. Its totient is φ = 9906824208.

The previous prime is 9906824203. The next prime is 9906824227. The reversal of 9906824209 is 9024286099.

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., 9648739984 + 258084225 = 98228^2 + 16065^2 .

It is a cyclic number.

It is not a de Polignac number, because 9906824209 - 2⁹ = 9906823697 is a prime.

It is not a weakly prime, because it can be changed into another prime (9906824203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953412104 + 4953412105.

It is an arithmetic number, because the mean of its divisors is an integer number (4953412105).

Almost surely, 2^9906824209 is an apocalyptic number.

It is an amenable number.

9906824209 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906824209 is an equidigital number, since it uses as much as digits as its factorization.

9906824209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 9906824209 is about 99533.0307435677. The cubic root of 9906824209 is about 2147.7224274377.

The spelling of 9906824209 in words is "nine billion, nine hundred six million, eight hundred twenty-four thousand, two hundred nine".