89891 has 2 divisors, whose sum is σ = 89892. Its totient is φ = 89890.

The previous prime is 89867. The next prime is 89897. The reversal of 89891 is 19898.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89891 - 2¹⁰ = 88867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44945 + 44946.

It is an arithmetic number, because the mean of its divisors is an integer number (44946).

2⁸⁹⁸⁹¹ is an apocalyptic number.

89891 is a deficient number, since it is larger than the sum of its proper divisors (1).

89891 is an equidigital number, since it uses as much as digits as its factorization.

89891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 89891 is about 299.8182782954. The cubic root of 89891 is about 44.7959485601.

It can be divided in two parts, 898 and 91, that multiplied together give a palindrome (81718).

The spelling of 89891 in words is "eighty-nine thousand, eight hundred ninety-one".