68111189 has 4 divisors (see below), whose sum is σ = 68306700. Its totient is φ = 67915680.

The previous prime is 68111167. The next prime is 68111203. The reversal of 68111189 is 98111186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98111186 = 2 ⋅49055593.

It can be written as a sum of positive squares in 2 ways, for example, as 46812964 + 21298225 = 6842^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 68111189 - 2²⁰ = 67062613 is a prime.

68111189 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68111149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97232 + ... + 97929.

It is an arithmetic number, because the mean of its divisors is an integer number (17076675).

Almost surely, 2^68111189 is an apocalyptic number.

It is an amenable number.

68111189 is a deficient number, since it is larger than the sum of its proper divisors (195511).

68111189 is a wasteful number, since it uses less digits than its factorization.

68111189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195510.

The product of its digits is 3456, while the sum is 35.

The square root of 68111189 is about 8252.9503209458. The cubic root of 68111189 is about 408.3878572571.

It can be divided in two parts, 6811 and 1189, that added together give a cube (8000 = 20³).

The spelling of 68111189 in words is "sixty-eight million, one hundred eleven thousand, one hundred eighty-nine".