138983 has 4 divisors (see below), whose sum is σ = 149688. Its totient is φ = 128280.

The previous prime is 138977. The next prime is 139021. The reversal of 138983 is 389831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138983 - 2⁴ = 138967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5333 + ... + 5358.

It is an arithmetic number, because the mean of its divisors is an integer number (37422).

2¹³⁸⁹⁸³ is an apocalyptic number.

138983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138983 is a deficient number, since it is larger than the sum of its proper divisors (10705).

138983 is a wasteful number, since it uses less digits than its factorization.

138983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704.

The product of its digits is 5184, while the sum is 32.

The square root of 138983 is about 372.8042381733. The cubic root of 138983 is about 51.7989027957.

The spelling of 138983 in words is "one hundred thirty-eight thousand, nine hundred eighty-three".