138843 has 6 divisors (see below), whose sum is σ = 200564. Its totient is φ = 92556.

The previous prime is 138841. The next prime is 138863. The reversal of 138843 is 348831.

It is not a de Polignac number, because 138843 - 2¹ = 138841 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138843.

It is not an unprimeable number, because it can be changed into a prime (138841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7705 + ... + 7722.

2¹³⁸⁸⁴³ is an apocalyptic number.

138843 is a deficient number, since it is larger than the sum of its proper divisors (61721).

138843 is a wasteful number, since it uses less digits than its factorization.

138843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15433 (or 15430 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 138843 is about 372.6164247588. The cubic root of 138843 is about 51.7815043064.

It can be divided in two parts, 1388 and 43, that added together give a triangular number (1431 = T₅₃).

The spelling of 138843 in words is "one hundred thirty-eight thousand, eight hundred forty-three".