138789 has 12 divisors (see below), whose sum is σ = 229216. Its totient is φ = 79272.

The previous prime is 138763. The next prime is 138793. The reversal of 138789 is 987831.

It is not a de Polignac number, because 138789 - 2⁷ = 138661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1039 + ... + 1164.

138789 is a Friedman number, since it can be written as 7*(18*8+3^9), using all its digits and the basic arithmetic operations.

2¹³⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

138789 is a deficient number, since it is larger than the sum of its proper divisors (90427).

138789 is a wasteful number, since it uses less digits than its factorization.

138789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216 (or 2213 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 138789 is about 372.5439571379. The cubic root of 138789 is about 51.7747903350.

The spelling of 138789 in words is "one hundred thirty-eight thousand, seven hundred eighty-nine".