168073189 has 2 divisors, whose sum is σ = 168073190. Its totient is φ = 168073188.

The previous prime is 168073181. The next prime is 168073193. The reversal of 168073189 is 981370861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100340289 + 67732900 = 10017^2 + 8230^2 .

It is a cyclic number.

It is not a de Polignac number, because 168073189 - 2³ = 168073181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168073181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84036594 + 84036595.

It is an arithmetic number, because the mean of its divisors is an integer number (84036595).

Almost surely, 2^168073189 is an apocalyptic number.

It is an amenable number.

168073189 is a deficient number, since it is larger than the sum of its proper divisors (1).

168073189 is an equidigital number, since it uses as much as digits as its factorization.

168073189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 168073189 is about 12964.3044163580. The cubic root of 168073189 is about 551.8649517787.

The spelling of 168073189 in words is "one hundred sixty-eight million, seventy-three thousand, one hundred eighty-nine".