3389
Port 3389 carries RDP, the Remote Desktop Protocol for controlling a Windows machine remotely.
- Odd
- Prime
Where 3389 fits
Why 3389 is special
3389 is the port most associated with ransomware entry. Exposing a desktop directly to the internet gives an attacker a login prompt to guess against, and public advisories have repeatedly named exposed RDP as a leading initial-access route.
3389 is part of
Factors & digit properties
- Divisors (2)
- 1, 3389
- Prime factorisation
- 3389
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 3389
- Binary
- 110100111101
- Octal
- 6475
- Hexadecimal
- d3d
- Roman numeral
- MMMCCCLXXXIX
- Scientific notation
- 3.389 × 10^3
Other mathematical patterns
- Deficient number
- Sophie Germain prime
- Twin prime
Related numbers & connections
Both give remote control of a machine — RDP a Windows desktop, SSH a shell. Exposing either directly to the internet presents an attacker with a login prompt, which is why both usually sit behind a VPN.
View 22 →VNC and RDP both provide remote control of a desktop. VNC sends the screen image and works anywhere; RDP sends drawing commands and is faster but tied to Windows.
View 5900 →Technology & computing
Exposing Remote Desktop directly to the internet presents an attacker with a login prompt to guess against, and public incident reporting has repeatedly identified exposed RDP as a leading initial-access route for ransomware. Putting it behind a VPN is the standard remedy.
DocumentedTechnology & computing
Common questions
Is 3389 a prime number?
Yes, 3389 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 3389?
The factors of 3389 are 1, 3389.
What is 3389 in Roman numerals?
3389 in Roman numerals is MMMCCCLXXXIX.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026