138859 has 8 divisors (see below), whose sum is σ = 161280. Its totient is φ = 117096.

The previous prime is 138841. The next prime is 138863. The reversal of 138859 is 958831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138859 - 2⁷ = 138731 is a prime.

138859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (138829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2¹³⁸⁸⁵⁹ is an apocalyptic number.

138859 is a deficient number, since it is larger than the sum of its proper divisors (22421).

138859 is an equidigital number, since it uses as much as digits as its factorization.

138859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329.

The product of its digits is 8640, while the sum is 34.

The square root of 138859 is about 372.6378939399. The cubic root of 138859 is about 51.7834932970.

The spelling of 138859 in words is "one hundred thirty-eight thousand, eight hundred fifty-nine".