139023 has 16 divisors (see below), whose sum is σ = 217600. Its totient is φ = 87480.

The previous prime is 139021. The next prime is 139033. The reversal of 139023 is 320931.

It is not a de Polignac number, because 139023 - 2¹ = 139021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138987 and 139005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378 + ... + 648.

It is an arithmetic number, because the mean of its divisors is an integer number (13600).

2¹³⁹⁰²³ is an apocalyptic number.

139023 is a deficient number, since it is larger than the sum of its proper divisors (78577).

139023 is a wasteful number, since it uses less digits than its factorization.

139023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 139023 is about 372.8578817727. The cubic root of 139023 is about 51.8038716465.

Adding to 139023 its reverse (320931), we get a palindrome (459954).

The spelling of 139023 in words is "one hundred thirty-nine thousand, twenty-three".