168533873 has 2 divisors, whose sum is σ = 168533874. Its totient is φ = 168533872.

The previous prime is 168533863. The next prime is 168533879. The reversal of 168533873 is 378335861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115068529 + 53465344 = 10727^2 + 7312^2 .

It is an emirp because it is prime and its reverse (378335861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168533873 is a prime.

It is not a weakly prime, because it can be changed into another prime (168533879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84266936 + 84266937.

It is an arithmetic number, because the mean of its divisors is an integer number (84266937).

Almost surely, 2^168533873 is an apocalyptic number.

It is an amenable number.

168533873 is a deficient number, since it is larger than the sum of its proper divisors (1).

168533873 is an equidigital number, since it uses as much as digits as its factorization.

168533873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 168533873 is about 12982.0596593915. The cubic root of 168533873 is about 552.3687073627.

The spelling of 168533873 in words is "one hundred sixty-eight million, five hundred thirty-three thousand, eight hundred seventy-three".