168446189 has 2 divisors, whose sum is σ = 168446190. Its totient is φ = 168446188.

The previous prime is 168446143. The next prime is 168446197. The reversal of 168446189 is 981644861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164994025 + 3452164 = 12845^2 + 1858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168446189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168446129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84223094 + 84223095.

It is an arithmetic number, because the mean of its divisors is an integer number (84223095).

Almost surely, 2^168446189 is an apocalyptic number.

It is an amenable number.

168446189 is a deficient number, since it is larger than the sum of its proper divisors (1).

168446189 is an equidigital number, since it uses as much as digits as its factorization.

168446189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 168446189 is about 12978.6820979636. The cubic root of 168446189 is about 552.2728961588.

The spelling of 168446189 in words is "one hundred sixty-eight million, four hundred forty-six thousand, one hundred eighty-nine".