68891 has 2 divisors, whose sum is σ = 68892. Its totient is φ = 68890.

The previous prime is 68881. The next prime is 68897. The reversal of 68891 is 19886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68891 - 2¹⁰ = 67867 is a prime.

It is a Chen prime.

It is a plaindrome in base 9.

It is not a weakly prime, because it can be changed into another prime (68897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34445 + 34446.

It is an arithmetic number, because the mean of its divisors is an integer number (34446).

2⁶⁸⁸⁹¹ is an apocalyptic number.

68891 is a deficient number, since it is larger than the sum of its proper divisors (1).

68891 is an equidigital number, since it uses as much as digits as its factorization.

68891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 68891 is about 262.4709507736. The cubic root of 68891 is about 40.9940502967.

It can be divided in two parts, 68 and 891, that added together give a palindrome (959).

The spelling of 68891 in words is "sixty-eight thousand, eight hundred ninety-one".