929
929 is a prime, odd, a calendar year.
929 (nine hundred twenty-nine) is an odd 3-digit number. It is a prime number — divisible only by 1 and itself. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in Roman numerals it is CMXXIX and in binary, 1110100001.
Interestingness
Historical context — 929 AD
Calendar year
Year 929 (CMXXIX) was a common year starting on Thursday of the Julian calendar.
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Historical context — 929 BC
Decade
The 920s BC is a decade that lasted from 929 BC to 920 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
-
Saturday
January 1, 929
- Ended on
-
Saturday
December 31, 929
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
920s
920–929
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,097
1097 years before 2026.
In other calendars
- Hebrew
-
4689 / 4690 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
316 / 317 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Ox
Sexagenary cycle position 26 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1472 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
307 / 308 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
921 / 922 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
851 / 850 Saka
Indian national calendar; year starts in March.
Properties
Primality
929 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√929 = [30; (2, 11, 1, 2, 3, 2, 7, 5, 2, 2, 5, 7, 2, 3, 2, 1, 11, 2, 60)]
Period length 19 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred twenty-nine
- Ordinal
- 929th
- Roman numeral
- CMXXIX
- Binary
- 1110100001
- Octal
- 1641
- Hexadecimal
- 0x3A1
- Base64
- A6E=
- One's complement
- 64,606 (16-bit)
- Scientific notation
- 9.29 × 10²
- As a duration
- 929 s = 15 minutes, 29 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ϡκθʹ
- Mayan (base 20)
- 𝋢·𝋦·𝋩
- Chinese
- 九百二十九
- Chinese (financial)
- 玖佰貳拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 929 = 8
- e — Euler's number (e)
- Digit 929 = 0
- φ — Golden ratio (φ)
- Digit 929 = 5
- √2 — Pythagoras's (√2)
- Digit 929 = 3
- ln 2 — Natural log of 2
- Digit 929 = 3
- γ — Euler-Mascheroni (γ)
- Digit 929 = 1
Also seen as
UTF-8 encoding: CE A1 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.161.
- Address
- 0.0.3.161
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.161
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 929 is an active NANP area code (North American Numbering Plan).
- Primary area
- New York City outer boroughs
- Region
- New York
- 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, 929 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, -6¢)
- Scientific pitch (C4 = 256 Hz): A♯5 (912.3 Hz, +31¢)
- Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, -5¢)
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.