168211819 has 2 divisors, whose sum is σ = 168211820. Its totient is φ = 168211818.

The previous prime is 168211801. The next prime is 168211843. The reversal of 168211819 is 918112861.

168211819 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 is a cyclic number.

It is not a de Polignac number, because 168211819 - 2¹¹ = 168209771 is a prime.

It is a super-2 number, since 2×168211819² = 56590432102577522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168211319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84105909 + 84105910.

It is an arithmetic number, because the mean of its divisors is an integer number (84105910).

Almost surely, 2^168211819 is an apocalyptic number.

168211819 is a deficient number, since it is larger than the sum of its proper divisors (1).

168211819 is an equidigital number, since it uses as much as digits as its factorization.

168211819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 37.

The square root of 168211819 is about 12969.6499181744. The cubic root of 168211819 is about 552.0166396913.

The spelling of 168211819 in words is "one hundred sixty-eight million, two hundred eleven thousand, eight hundred nineteen".