8404508209 has 2 divisors, whose sum is σ = 8404508210. Its totient is φ = 8404508208.

The previous prime is 8404508191. The next prime is 8404508213. The reversal of 8404508209 is 9028054048.

8404508209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8096400400 + 308107809 = 89980^2 + 17553^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404508209 - 2¹¹ = 8404506161 is a prime.

It is not a weakly prime, because it can be changed into another prime (8404508219) 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, 4202254104 + 4202254105.

It is an arithmetic number, because the mean of its divisors is an integer number (4202254105).

Almost surely, 2^8404508209 is an apocalyptic number.

It is an amenable number.

8404508209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404508209 is an equidigital number, since it uses as much as digits as its factorization.

8404508209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 8404508209 is about 91676.1048965323. The cubic root of 8404508209 is about 2033.1563094803.

The spelling of 8404508209 in words is "eight billion, four hundred four million, five hundred eight thousand, two hundred nine".