1723
Port 1723 carries PPTP, an early and now-broken VPN protocol.
- Odd
- Prime
Where 1723 fits
Why 1723 is special
PPTP is included as a warning rather than a recommendation: its authentication was reduced to a single DES key strength in 2012 and can be broken in hours regardless of password. It is still offered by consumer routers, which is the reason worth knowing about it.
1723 is part of
Factors & digit properties
- Divisors (2)
- 1, 1723
- Prime factorisation
- 1723
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1723
- Binary
- 11010111011
- Octal
- 3273
- Hexadecimal
- 6bb
- Roman numeral
- MDCCXXIII
- Scientific notation
- 1.723 × 10^3
Other mathematical patterns
- Deficient number
- Lucky number (mathematical sieve)
- Twin prime
Related numbers & connections
PPTP and OpenVPN are two generations of VPN. PPTP's authentication was broken publicly in 2012 and it persists on consumer routers; OpenVPN is frequently moved to port 443 to avoid being blocked.
View 1194 →Other connections
- contrasts with1194
why?
Strength 0.50, confidence "high".
Technology & computing
PPTP's authentication was reduced to single-DES strength by a public demonstration in 2012, meaning any captured session can be broken in hours regardless of password quality. It remains available on consumer routers, which is the reason it is worth knowing rather than a reason to use it.
DocumentedTechnology & computing
Common questions
Is 1723 a prime number?
Yes, 1723 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1723?
The factors of 1723 are 1, 1723.
What is 1723 in Roman numerals?
1723 in Roman numerals is MDCCXXIII.
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