odd, prime · 139th positive integer
The number 139
139 is an odd prime number. It is the 139th positive integer.
Quick reference
| Prime factorization | 139 (prime) |
| Divisors | 1, 139 |
| Binary | 10001011 |
| Hexadecimal | 0x8B |
| Roman numeral | CXXXIX |
| Digit sum | 13 |
| Properties | odd, prime |
Reading 139 in NumGrid context
The 139 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 139 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for 139 is typically a peer within positive integers within the NumGrid target pool with similar size, similar exposure, or similar geography — not the national-level summary alone.
Frequently asked
Is 139 a prime number?
Yes. 139 is prime — its only divisors are 1 and itself.
What are the factors of 139?
The factors (divisors) of 139 are 1, 139.
What is 139 in binary?
139 in binary is 10001011. In hexadecimal it's 8B.
What is 139 as a Roman numeral?
139 in Roman numerals is CXXXIX.
What's the digit sum of 139?
Adding the digits of 139: 1 + 3 + 9 = 13.