168939193 has 2 divisors, whose sum is σ = 168939194. Its totient is φ = 168939192.

The previous prime is 168939191. The next prime is 168939247. The reversal of 168939193 is 391939861.

168939193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 3250809 = 12872^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 168939193 - 2¹ = 168939191 is a prime.

Together with 168939191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168939191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84469596 + 84469597.

It is an arithmetic number, because the mean of its divisors is an integer number (84469597).

Almost surely, 2^168939193 is an apocalyptic number.

It is an amenable number.

168939193 is a deficient number, since it is larger than the sum of its proper divisors (1).

168939193 is an equidigital number, since it uses as much as digits as its factorization.

168939193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 49.

The square root of 168939193 is about 12997.6610588213. The cubic root of 168939193 is about 552.8111641018.

The spelling of 168939193 in words is "one hundred sixty-eight million, nine hundred thirty-nine thousand, one hundred ninety-three".