168712393 has 2 divisors, whose sum is σ = 168712394. Its totient is φ = 168712392.

The previous prime is 168712387. The next prime is 168712421. The reversal of 168712393 is 393217861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164660224 + 4052169 = 12832^2 + 2013^2 .

It is an emirp because it is prime and its reverse (393217861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168712393 - 2⁵ = 168712361 is a prime.

It is not a weakly prime, because it can be changed into another prime (168712373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84356196 + 84356197.

It is an arithmetic number, because the mean of its divisors is an integer number (84356197).

Almost surely, 2^168712393 is an apocalyptic number.

It is an amenable number.

168712393 is a deficient number, since it is larger than the sum of its proper divisors (1).

168712393 is an equidigital number, since it uses as much as digits as its factorization.

168712393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 168712393 is about 12988.9334820069. The cubic root of 168712393 is about 552.5636712655.

The spelling of 168712393 in words is "one hundred sixty-eight million, seven hundred twelve thousand, three hundred ninety-three".