168888911 has 2 divisors, whose sum is σ = 168888912. Its totient is φ = 168888910.

The previous prime is 168888901. The next prime is 168888913. The reversal of 168888911 is 119888861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168888911 - 2²⁶ = 101780047 is a prime.

It is a Sophie Germain prime.

Together with 168888913, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168888911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168888913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84444455 + 84444456.

It is an arithmetic number, because the mean of its divisors is an integer number (84444456).

Almost surely, 2^168888911 is an apocalyptic number.

168888911 is a deficient number, since it is larger than the sum of its proper divisors (1).

168888911 is an equidigital number, since it uses as much as digits as its factorization.

168888911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 50.

The square root of 168888911 is about 12995.7266437856. The cubic root of 168888911 is about 552.7563135791.

Subtracting from 168888911 its sum of digits (50), we obtain a palindrome (168888861).

Subtracting from 168888911 its reverse (119888861), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 168888911 in words is "one hundred sixty-eight million, eight hundred eighty-eight thousand, nine hundred eleven".