138841 has 2 divisors, whose sum is σ = 138842. Its totient is φ = 138840.

The previous prime is 138829. The next prime is 138863. The reversal of 138841 is 148831.

138841 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., 90000 + 48841 = 300^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 138841 - 2¹³ = 130649 is a prime.

138841 is a lucky number.

It is a zygodrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69420 + 69421.

It is an arithmetic number, because the mean of its divisors is an integer number (69421).

2¹³⁸⁸⁴¹ is an apocalyptic number.

It is an amenable number.

138841 is a deficient number, since it is larger than the sum of its proper divisors (1).

138841 is an equidigital number, since it uses as much as digits as its factorization.

138841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 138841 is about 372.6137410241. The cubic root of 138841 is about 51.7812556719.

It can be divided in two parts, 138 and 841, that added together give a palindrome (979).

The spelling of 138841 in words is "one hundred thirty-eight thousand, eight hundred forty-one".