168541973 has 2 divisors, whose sum is σ = 168541974. Its totient is φ = 168541972.

The previous prime is 168541957. The next prime is 168541979. The reversal of 168541973 is 379145861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168013444 + 528529 = 12962^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 168541973 - 2⁴ = 168541957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168541979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84270986 + 84270987.

It is an arithmetic number, because the mean of its divisors is an integer number (84270987).

Almost surely, 2^168541973 is an apocalyptic number.

It is an amenable number.

168541973 is a deficient number, since it is larger than the sum of its proper divisors (1).

168541973 is an equidigital number, since it uses as much as digits as its factorization.

168541973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 168541973 is about 12982.3716246301. The cubic root of 168541973 is about 552.3775564540.

The spelling of 168541973 in words is "one hundred sixty-eight million, five hundred forty-one thousand, nine hundred seventy-three".