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.
Same number, different meanings
How 1433 is understood across different contexts — never implying one meaning because of another.
- Mathematics
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.
- History
In 1433, the last of Zheng He's seven voyages returned, and China withdrew from long-range seafaring (Indian Ocean).
- 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.
1433 is part of
Factors & digit properties
- Divisors (2)
- 1, 1433
- Prime factorisation
- 1433
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 1433
- Scientific notation
- 1.433 × 10^3
Roman numerals
M C D X X X I I I
MCDXXXIII uses the subtractive pair CD: a hundred before five hundred — five hundred minus a hundred.
Binary
1 0 1 1 0 0 1 1 0 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,433
Octal
2 6 3 1
2 × 512 + 6 × 64 + 3 × 8 + 1 × 1 = 1,433
Hexadecimal
5 9 9
5 × 256 + 9 × 16 + 9 × 1 = 1,433
Read as powers of two: 1,024 + 256 + 128 + 16 + 8 + 1 = 1,433.
In historical numeral systems
Egyptian
1 lotus, 4 coils of rope, 3 hobbles, 3 strokes
1 × 1,000 + 4 × 100 + 3 × 10 + 3 × 1 = 1,433. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 3 vertical wedges (sixties place), 5 corner wedges + 3 vertical wedges (units place)
23 × 60 + 53 = 1433. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
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 →History
In 1433, the last of Zheng He's seven voyages returned, and China withdrew from long-range seafaring (Indian Ocean).
DocumentedHistoryGeography: Indian OceanPeriod: 1433
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. CD is subtractive: a hundred before five hundred — five hundred minus a hundred. Written additively it would be MCCCCXXXIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026