168538793 has 2 divisors, whose sum is σ = 168538794. Its totient is φ = 168538792.

The previous prime is 168538787. The next prime is 168538831. The reversal of 168538793 is 397835861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143808064 + 24730729 = 11992^2 + 4973^2 .

It is a cyclic number.

It is not a de Polignac number, because 168538793 - 2²⁰ = 167490217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168538763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84269396 + 84269397.

It is an arithmetic number, because the mean of its divisors is an integer number (84269397).

Almost surely, 2^168538793 is an apocalyptic number.

It is an amenable number.

168538793 is a deficient number, since it is larger than the sum of its proper divisors (1).

168538793 is an equidigital number, since it uses as much as digits as its factorization.

168538793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 168538793 is about 12982.2491502821. The cubic root of 168538793 is about 552.3740824001.

The spelling of 168538793 in words is "one hundred sixty-eight million, five hundred thirty-eight thousand, seven hundred ninety-three".