138893 has 2 divisors, whose sum is σ = 138894.
Its totient is φ = 138892.
The previous prime is 138889. The next prime is 138899. The reversal of 138893 is 398831.
138893 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., 114244 + 24649 = 338^2 + 157^2
It is a cyclic number.
It is not a de Polignac number, because 138893 - 22 = 138889 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is a plaindrome in base 14.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (138899) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69446 + 69447.
It is an arithmetic number, because the mean of its divisors is an integer number (69447).
2138893 is an apocalyptic number.
It is an amenable number.
138893 is a deficient number, since it is larger than the sum of its proper divisors (1).
138893 is an equidigital number, since it uses as much as digits as its factorization.
138893 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 5184, while the sum is 32.
The square root of 138893 is about 372.6835118435.
The cubic root of 138893 is about 51.7877193946.
The spelling of 138893 in words is "one hundred thirty-eight thousand, eight hundred ninety-three".