68911 has 4 divisors (see below), whose sum is σ = 69552. Its totient is φ = 68272.

The previous prime is 68909. The next prime is 68917. The reversal of 68911 is 11986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68911 - 2¹ = 68909 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68917) 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, 115 + ... + 388.

It is an arithmetic number, because the mean of its divisors is an integer number (17388).

2⁶⁸⁹¹¹ is an apocalyptic number.

68911 is a deficient number, since it is larger than the sum of its proper divisors (641).

68911 is a wasteful number, since it uses less digits than its factorization.

68911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its digits is 432, while the sum is 25.

The square root of 68911 is about 262.5090474631. The cubic root of 68911 is about 40.9980169574.

Subtracting from 68911 its sum of digits (25), we obtain a palindrome (68886).

It can be divided in two parts, 68 and 911, that added together give a palindrome (979).

The spelling of 68911 in words is "sixty-eight thousand, nine hundred eleven".