9941 has 2 divisors, whose sum is σ = 9942.
Its totient is φ = 9940.
The previous prime is 9931. The next prime is 9949. The reversal of 9941 is 1499.
9941 = 702 + 712.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 5041 + 4900 = 71^2 + 70^2
It is an emirp because it is prime and its reverse (1499) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9941 is a prime.
It is a Chen prime.
It is an Ulam number.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9949) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4970 + 4971.
It is an arithmetic number, because the mean of its divisors is an integer number (4971).
29941 is an apocalyptic number.
9941 is the 71-st centered square number.
It is an amenable number.
9941 is a deficient number, since it is larger than the sum of its proper divisors (1).
9941 is an equidigital number, since it uses as much as digits as its factorization.
9941 is an evil number, because the sum of its binary digits is even.
The product of its digits is 324, while the sum is 23.
The square root of 9941 is about 99.7045635866.
The cubic root of 9941 is about 21.5018927485.
The spelling of 9941 in words is "nine thousand, nine hundred forty-one".