168543073 has 2 divisors, whose sum is σ = 168543074. Its totient is φ = 168543072.

The previous prime is 168543071. The next prime is 168543079. The reversal of 168543073 is 370345861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167236624 + 1306449 = 12932^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 168543073 - 2¹ = 168543071 is a prime.

Together with 168543071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168543071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84271536 + 84271537.

It is an arithmetic number, because the mean of its divisors is an integer number (84271537).

Almost surely, 2^168543073 is an apocalyptic number.

It is an amenable number.

168543073 is a deficient number, since it is larger than the sum of its proper divisors (1).

168543073 is an equidigital number, since it uses as much as digits as its factorization.

168543073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 168543073 is about 12982.4139897016. The cubic root of 168543073 is about 552.3787581605.

The spelling of 168543073 in words is "one hundred sixty-eight million, five hundred forty-three thousand, seventy-three".