139039 has 4 divisors (see below), whose sum is σ = 140056. Its totient is φ = 138024.

The previous prime is 139033. The next prime is 139067. The reversal of 139039 is 930931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139039 - 2¹¹ = 136991 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 (139033) 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, 264 + ... + 589.

It is an arithmetic number, because the mean of its divisors is an integer number (35014).

2¹³⁹⁰³⁹ is an apocalyptic number.

139039 is a deficient number, since it is larger than the sum of its proper divisors (1017).

139039 is an equidigital number, since it uses as much as digits as its factorization.

139039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 139039 is about 372.8793370515. The cubic root of 139039 is about 51.8058589200.

The spelling of 139039 in words is "one hundred thirty-nine thousand, thirty-nine".