1013
Standard atmospheric pressure at sea level is 1,013 hectopascals.
- Odd
- Prime
Where 1013 fits
Why 1013 is special
It is the same pressure as 760 mm of mercury, expressed in the unit weather forecasts use. Readings below about 1,000 hPa indicate a depression; the lowest recorded at sea level, in Typhoon Tip in 1979, was 870 hPa.
1013 is part of
Factors & digit properties
- Divisors (2)
- 1, 1013
- Prime factorisation
- 1013
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 1013
- Binary
- 1111110101
- Octal
- 1765
- Hexadecimal
- 3f5
- Roman numeral
- MXIII
- Scientific notation
- 1.013 × 10^3
Other mathematical patterns
- Deficient number
- Sophie Germain prime
Related numbers & connections
The same standard sea-level pressure in two units — 1,013 hPa and 760 mm of mercury. Meteorology uses the first and medicine still largely uses the second.
View 760 →Science
1,013 hPa is standard sea-level pressure, the same as 760 mm of mercury in the unit meteorology uses. Below about 1,000 hPa indicates a depression; the lowest sea-level reading ever recorded was 870 hPa in Typhoon Tip in 1979.
DocumentedScience
Common questions
Is 1013 a prime number?
Yes, 1013 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1013?
The factors of 1013 are 1, 1013.
What is 1013 in Roman numerals?
1013 in Roman numerals is MXIII.
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