138835 has 4 divisors (see below), whose sum is σ = 166608. Its totient is φ = 111064.

The previous prime is 138829. The next prime is 138841. The reversal of 138835 is 538831.

138835 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 538831 = 37 ⋅14563.

It is an interprime number because it is at equal distance from previous prime (138829) and next prime (138841).

It is a cyclic number.

It is not a de Polignac number, because 138835 - 2⁹ = 138323 is a prime.

It is an Ulam number.

It is a Duffinian number.

138835 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13879 + ... + 13888.

It is an arithmetic number, because the mean of its divisors is an integer number (41652).

2¹³⁸⁸³⁵ is an apocalyptic number.

138835 is a deficient number, since it is larger than the sum of its proper divisors (27773).

138835 is an equidigital number, since it uses as much as digits as its factorization.

138835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27772.

The product of its digits is 2880, while the sum is 28.

The square root of 138835 is about 372.6056897043. The cubic root of 138835 is about 51.7805097538.

The spelling of 138835 in words is "one hundred thirty-eight thousand, eight hundred thirty-five".