odd, prime · 859th positive integer
The number 859
859 is an odd prime number. It is the 859th positive integer.
Quick reference
| Prime factorization | 859 (prime) |
| Divisors | 1, 859 |
| Binary | 1101011011 |
| Hexadecimal | 0x35B |
| Roman numeral | DCCCLIX |
| Digit sum | 22 |
| Properties | odd, prime |
Reading 859 in NumGrid context
The 859 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 859 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.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 859’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 859 a prime number?
Yes. 859 is prime — its only divisors are 1 and itself.
What are the factors of 859?
The factors (divisors) of 859 are 1, 859.
What is 859 in binary?
859 in binary is 1101011011. In hexadecimal it's 35B.
What is 859 as a Roman numeral?
859 in Roman numerals is DCCCLIX.
What's the digit sum of 859?
Adding the digits of 859: 8 + 5 + 9 = 22.