913
913 is a composite number, odd, a calendar year.
913 (nine hundred thirteen) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 11 × 83. Written other ways, in Roman numerals it is CMXIII and in binary, 1110010001.
Interestingness
Historical context — 913 AD
Calendar year
Year 913 (CMXIII) was a common year starting on Friday of the Julian calendar.
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Historical context — 913 BC
Decade
The 910s BC is a decade that lasted from 919 BC to 910 BC.
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Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Sunday
January 1, 913
- Ended on
-
Sunday
December 31, 913
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
910s
910–919
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,113
1113 years before 2026.
In other calendars
- Hebrew
-
4673 / 4674 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
300 / 301 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1456 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
291 / 292 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
905 / 906 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
835 / 834 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 11 × 83
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√913 = [30; (4, 1, 1, 1, 2, 1, 1, 6, 7, 2, 2, 19, 1, 2, 1, 4, 1, 2, 1, 19, 2, 2, 7, 6, …)]
Period length 32 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred thirteen
- Ordinal
- 913th
- Roman numeral
- CMXIII
- Binary
- 1110010001
- Octal
- 1621
- Hexadecimal
- 0x391
- Base64
- A5E=
- One's complement
- 64,622 (16-bit)
- Scientific notation
- 9.13 × 10²
- As a duration
- 913 s = 15 minutes, 13 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ϡιγʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋭
- Chinese
- 九百一十三
- Chinese (financial)
- 玖佰壹拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 913 = 8
- e — Euler's number (e)
- Digit 913 = 8
- φ — Golden ratio (φ)
- Digit 913 = 2
- √2 — Pythagoras's (√2)
- Digit 913 = 2
- ln 2 — Natural log of 2
- Digit 913 = 2
- γ — Euler-Mascheroni (γ)
- Digit 913 = 8
Also seen as
UTF-8 encoding: CE 91 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.145.
- Address
- 0.0.3.145
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.145
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 913 is an active NANP area code (North American Numbering Plan).
- Primary area
- Kansas City suburbs
- Region
- Kansas
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Heard as a frequency, 913 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, -36¢)
- Scientific pitch (C4 = 256 Hz): A♯5 (912.3 Hz, +1¢)
- Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, -35¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.