8209846009 has 2 divisors, whose sum is σ = 8209846010. Its totient is φ = 8209846008.

The previous prime is 8209845997. The next prime is 8209846013. The reversal of 8209846009 is 9006489028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6561486009 + 1648360000 = 81003^2 + 40600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8209846009 - 2⁷ = 8209845881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8209846009.

It is not a weakly prime, because it can be changed into another prime (8209846609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4104923004 + 4104923005.

It is an arithmetic number, because the mean of its divisors is an integer number (4104923005).

Almost surely, 2^8209846009 is an apocalyptic number.

It is an amenable number.

8209846009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8209846009 is an equidigital number, since it uses as much as digits as its factorization.

8209846009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 8209846009 is about 90608.2005615386. The cubic root of 8209846009 is about 2017.3364568388.

The spelling of 8209846009 in words is "eight billion, two hundred nine million, eight hundred forty-six thousand, nine".