168196393 has 2 divisors, whose sum is σ = 168196394. Its totient is φ = 168196392.

The previous prime is 168196367. The next prime is 168196423. The reversal of 168196393 is 393691861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167003929 + 1192464 = 12923^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 168196393 - 2⁵ = 168196361 is a prime.

It is not a weakly prime, because it can be changed into another prime (168196313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84098196 + 84098197.

It is an arithmetic number, because the mean of its divisors is an integer number (84098197).

Almost surely, 2^168196393 is an apocalyptic number.

It is an amenable number.

168196393 is a deficient number, since it is larger than the sum of its proper divisors (1).

168196393 is an equidigital number, since it uses as much as digits as its factorization.

168196393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 168196393 is about 12969.0552084568. The cubic root of 168196393 is about 551.9997647990. Note that the first 3 decimals are identical.

The spelling of 168196393 in words is "one hundred sixty-eight million, one hundred ninety-six thousand, three hundred ninety-three".