139839 has 8 divisors (see below), whose sum is σ = 213120. Its totient is φ = 79896.

The previous prime is 139837. The next prime is 139861. The reversal of 139839 is 938931.

139839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139839 - 2¹ = 139837 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139831) 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, 3309 + ... + 3350.

It is an arithmetic number, because the mean of its divisors is an integer number (26640).

2¹³⁹⁸³⁹ is an apocalyptic number.

139839 is a deficient number, since it is larger than the sum of its proper divisors (73281).

139839 is an equidigital number, since it uses as much as digits as its factorization.

139839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

The product of its digits is 5832, while the sum is 33.

The square root of 139839 is about 373.9505314878. The cubic root of 139839 is about 51.9050288228.

The spelling of 139839 in words is "one hundred thirty-nine thousand, eight hundred thirty-nine".