68111837 has 4 divisors (see below), whose sum is σ = 69397020. Its totient is φ = 66826656.

The previous prime is 68111833. The next prime is 68111861. The reversal of 68111837 is 73811186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38800441 + 29311396 = 6229^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 68111837 - 2² = 68111833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68111797 and 68111806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68111833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642512 + ... + 642617.

It is an arithmetic number, because the mean of its divisors is an integer number (17349255).

Almost surely, 2^68111837 is an apocalyptic number.

It is an amenable number.

68111837 is a deficient number, since it is larger than the sum of its proper divisors (1285183).

68111837 is a wasteful number, since it uses less digits than its factorization.

68111837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285182.

The product of its digits is 8064, while the sum is 35.

The square root of 68111837 is about 8252.9895795403. The cubic root of 68111837 is about 408.3891523674.

The spelling of 68111837 in words is "sixty-eight million, one hundred eleven thousand, eight hundred thirty-seven".