83891 has 2 divisors, whose sum is σ = 83892. Its totient is φ = 83890.

The previous prime is 83873. The next prime is 83903. The reversal of 83891 is 19838.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41945 + 41946.

It is an arithmetic number, because the mean of its divisors is an integer number (41946).

2⁸³⁸⁹¹ is an apocalyptic number.

83891 is a deficient number, since it is larger than the sum of its proper divisors (1).

83891 is an equidigital number, since it uses as much as digits as its factorization.

83891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 83891 is about 289.6394310173. The cubic root of 83891 is about 43.7762400411.

It can be divided in two parts, 838 and 91, that added together give a palindrome (929).

The spelling of 83891 in words is "eighty-three thousand, eight hundred ninety-one".