1433
Port 1433 is the default port for Microsoft SQL Server.
- Odd
- Prime
Where 1433 fits
Why 1433 is special
1433 completes the set of database defaults alongside MySQL's 3306 and PostgreSQL's 5432. All three are among the most scanned ports on the internet for the same reason: the default is almost never changed, so an exposed database is found by automation rather than by anyone looking for it.
1433 is part of
Factors & digit properties
- Divisors (2)
- 1, 1433
- Prime factorisation
- 1433
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 1433
- Binary
- 10110011001
- Octal
- 2631
- Hexadecimal
- 599
- Roman numeral
- MCDXXXIII
- Scientific notation
- 1.433 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
Microsoft SQL Server and PostgreSQL defaults. With MySQL's 3306 they are the three database ports automated scanners check first, because almost nobody changes them.
View 5432 →Technology & computing
1433 completes the set with MySQL's 3306 and PostgreSQL's 5432. All three are heavily scanned for the same reason: the default is almost never changed, so an exposed database is found by automation rather than by anyone specifically looking.
DocumentedTechnology & computing
Common questions
Is 1433 a prime number?
Yes, 1433 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1433?
The factors of 1433 are 1, 1433.
What is 1433 in Roman numerals?
1433 in Roman numerals is MCDXXXIII.
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