9841 has 4 divisors (see below), whose sum is σ = 10612.
Its totient is φ = 9072.
The previous prime is 9839. The next prime is 9851. The reversal of 9841 is 1489.
It can be divided in two parts, 9 and 841, that multiplied together give a square (7569 = 872).
9841 is nontrivially palindromic in base 3.
9841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is the 41-st star number.
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 3600 + 6241 = 60^2 + 79^2
It is a cyclic number.
It is not a de Polignac number, because 9841 - 21 = 9839 is a prime.
It is a Duffinian number.
9841 is a lucky number.
9841 is a nontrivial repdigit in base 3.
It is a plaindrome in base 3 and base 9.
It is a nialpdrome in base 3 and base 10.
It is a zygodrome in base 3.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9811) by changing a digit.
It is a nontrivial repunit in base 3.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366 + ... + 391.
It is an arithmetic number, because the mean of its divisors is an integer number (2653).
29841 is an apocalyptic number.
It is an amenable number.
9841 is a deficient number, since it is larger than the sum of its proper divisors (771).
9841 is a wasteful number, since it uses less digits than its factorization.
9841 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 770.
The product of its digits is 288, while the sum is 22.
The square root of 9841 is about 99.2018144995.
The cubic root of 9841 is about 21.4295512779.
The spelling of 9841 in words is "nine thousand, eight hundred forty-one".