168388133 has 2 divisors, whose sum is σ = 168388134. Its totient is φ = 168388132.

The previous prime is 168388093. The next prime is 168388141. The reversal of 168388133 is 331883861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119290084 + 49098049 = 10922^2 + 7007^2 .

It is a cyclic number.

It is not a de Polignac number, because 168388133 - 2⁶ = 168388069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168388433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84194066 + 84194067.

It is an arithmetic number, because the mean of its divisors is an integer number (84194067).

Almost surely, 2^168388133 is an apocalyptic number.

It is an amenable number.

168388133 is a deficient number, since it is larger than the sum of its proper divisors (1).

168388133 is an equidigital number, since it uses as much as digits as its factorization.

168388133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 168388133 is about 12976.4453144919. The cubic root of 168388133 is about 552.2094408012.

The spelling of 168388133 in words is "one hundred sixty-eight million, three hundred eighty-eight thousand, one hundred thirty-three".