168425189 has 2 divisors, whose sum is σ = 168425190. Its totient is φ = 168425188.

The previous prime is 168425183. The next prime is 168425237. The reversal of 168425189 is 981524861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162996289 + 5428900 = 12767^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 168425189 - 2¹² = 168421093 is a prime.

It is a super-3 number, since 3×168425189³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168425183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84212594 + 84212595.

It is an arithmetic number, because the mean of its divisors is an integer number (84212595).

Almost surely, 2^168425189 is an apocalyptic number.

It is an amenable number.

168425189 is a deficient number, since it is larger than the sum of its proper divisors (1).

168425189 is an equidigital number, since it uses as much as digits as its factorization.

168425189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 44.

The square root of 168425189 is about 12977.8730537789. The cubic root of 168425189 is about 552.2499447881.

The spelling of 168425189 in words is "one hundred sixty-eight million, four hundred twenty-five thousand, one hundred eighty-nine".