8208118309 has 2 divisors, whose sum is σ = 8208118310. Its totient is φ = 8208118308.

The previous prime is 8208118297. The next prime is 8208118333. The reversal of 8208118309 is 9038118028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8204374084 + 3744225 = 90578^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 8208118309 - 2⁷ = 8208118181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8208118379) 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, 4104059154 + 4104059155.

It is an arithmetic number, because the mean of its divisors is an integer number (4104059155).

Almost surely, 2^8208118309 is an apocalyptic number.

It is an amenable number.

8208118309 is a deficient number, since it is larger than the sum of its proper divisors (1).

8208118309 is an equidigital number, since it uses as much as digits as its factorization.

8208118309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 8208118309 is about 90598.6661546405. Note that the first 3 decimals coincide. The cubic root of 8208118309 is about 2017.1949358444.

The spelling of 8208118309 in words is "eight billion, two hundred eight million, one hundred eighteen thousand, three hundred nine".