Numberwise

1003

IEEE 1003 is POSIX.

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Where 1003 fits

Where 1003 fits: Mathematics, Technology, Related numbersMathematics: Happy number, Semiprime. Technology: Numbers assigned as identifiers, Standards issued by an organisation. Related numbers: 8802, 1275.MathematicsHappy numberSemiprimeTechnologyNumbers assigned as identif…Standards issued by an orga…Related numbers880212751003
1003 connects to 3 worlds: mathematics, technology, related numbers.

Why 1003 is special

It defines what a Unix-like system must provide, which is why a program written for one can be compiled on another, and why Windows shipped a subsystem to claim compliance.

1003 is part of

Standards and specification numbersIdentifier numbersHappy numbersNumbers around us

Factors & digit properties

Divisors (4)
1, 17, 59, 1003
Prime factorisation
17 × 59
Digit sum
4
Digital root
4

Representations

Decimal
1003
Binary
1111101011
Octal
1753
Hexadecimal
3eb
Roman numeral
MIII
Scientific notation
1.003 × 10^3

Other mathematical patterns

Related numbers & connections

Documented appearance
IEEE 1003 labels POSIX, a standard better known by its name than its number, which is unusual for this registry.

IEEE 1003 labels POSIX, a standard better known by its name than its number, which is unusual for this registry.

Connection
POSIX and the network standards are the two portability layers that let software move between systems.

POSIX and the network standards are the two portability layers that let software move between systems.

View 8802 →

Numbers Around Us

  • appears inNumbers assigned as identifiers
    why?

    Strength 0.50, confidence "high".

  • appears inStandards issued by an organisation
    why?

    Strength 0.50, confidence "high".

Other connections

  • is associated with8802
    why?

    Strength 0.50, confidence "high".

  • is associated with1275
    why?

    Strength 0.50, confidence "high".

How is 1003 connected to another number? →

Technology & computing

  • IEEE 1003 specifies the Portable Operating System Interface, standardising system calls, shell and utilities. Conformance was a procurement requirement in United States federal purchasing.

    DocumentedTechnology & computingGeography: International — IEEEPeriod: 1988–

Common questions

Is 1003 a prime number?

No, 1003 is not prime.

What are the factors of 1003?

The factors of 1003 are 1, 17, 59, 1003.

What is 1003 in Roman numerals?

1003 in Roman numerals is MIII.

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