168518719 has 2 divisors, whose sum is σ = 168518720. Its totient is φ = 168518718.

The previous prime is 168518717. The next prime is 168518731. The reversal of 168518719 is 917815861.

168518719 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 168518719 - 2¹ = 168518717 is a prime.

It is a super-2 number, since 2×168518719² = 56797117306801922, which contains 22 as substring.

Together with 168518717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168518717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84259359 + 84259360.

It is an arithmetic number, because the mean of its divisors is an integer number (84259360).

Almost surely, 2^168518719 is an apocalyptic number.

168518719 is a deficient number, since it is larger than the sum of its proper divisors (1).

168518719 is an equidigital number, since it uses as much as digits as its factorization.

168518719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 46.

The square root of 168518719 is about 12981.4759946625. The cubic root of 168518719 is about 552.3521511533.

The spelling of 168518719 in words is "one hundred sixty-eight million, five hundred eighteen thousand, seven hundred nineteen".