39841 has 2 divisors, whose sum is σ = 39842. Its totient is φ = 39840.

The previous prime is 39839. The next prime is 39847. The reversal of 39841 is 14893.

39841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30625 + 9216 = 175^2 + 96^2 .

It is a cyclic number.

It is not a de Polignac number, because 39841 - 2¹ = 39839 is a prime.

Together with 39839, it forms a pair of twin primes.

39841 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (39847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19920 + 19921.

It is an arithmetic number, because the mean of its divisors is an integer number (19921).

2³⁹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

39841 is a deficient number, since it is larger than the sum of its proper divisors (1).

39841 is an equidigital number, since it uses as much as digits as its factorization.

39841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 39841 is about 199.6021041973. The cubic root of 39841 is about 34.1541443965.

The spelling of 39841 in words is "thirty-nine thousand, eight hundred forty-one".