6818008189 has 2 divisors, whose sum is σ = 6818008190. Its totient is φ = 6818008188.

The previous prime is 6818008181. The next prime is 6818008201. The reversal of 6818008189 is 9818008186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5552783289 + 1265224900 = 74517^2 + 35570^2 .

It is a cyclic number.

It is not a de Polignac number, because 6818008189 - 2³ = 6818008181 is a prime.

6818008189 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6818008181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409004094 + 3409004095.

It is an arithmetic number, because the mean of its divisors is an integer number (3409004095).

Almost surely, 2^6818008189 is an apocalyptic number.

It is an amenable number.

6818008189 is a deficient number, since it is larger than the sum of its proper divisors (1).

6818008189 is an equidigital number, since it uses as much as digits as its factorization.

6818008189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 49.

The square root of 6818008189 is about 82571.2310008758. The cubic root of 6818008189 is about 1896.2074105507.

The spelling of 6818008189 in words is "six billion, eight hundred eighteen million, eight thousand, one hundred eighty-nine".