812008189 has 2 divisors, whose sum is σ = 812008190. Its totient is φ = 812008188.

The previous prime is 812008121. The next prime is 812008199. The reversal of 812008189 is 981800218.

812008189 is digitally balanced in base 2, 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., 776068164 + 35940025 = 27858^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 812008189 - 2¹¹ = 812006141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812008199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406004094 + 406004095.

It is an arithmetic number, because the mean of its divisors is an integer number (406004095).

Almost surely, 2^812008189 is an apocalyptic number.

It is an amenable number.

812008189 is a deficient number, since it is larger than the sum of its proper divisors (1).

812008189 is an equidigital number, since it uses as much as digits as its factorization.

812008189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 812008189 is about 28495.7573859689. The cubic root of 812008189 is about 932.9394753014.

The spelling of 812008189 in words is "eight hundred twelve million, eight thousand, one hundred eighty-nine".