373
373 is a prime, odd, a calendar year.
373 (three hundred seventy-three) 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 CCCLXXIII and in binary, 101110101.
Interestingness
Historical context — 373 AD
Calendar year
Year 373 (CCCLXXIII) was a common year starting on Tuesday of the Julian calendar.
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Historical context — 373 BC
Calendar year
Year 373 BC was a year of the pre-Julian Roman calendar.
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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
-
Monday
January 1, 373
- Ended on
-
Monday
December 31, 373
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
370s
370–379
- Century
-
4th century
301–400
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,653
1653 years before 2026.
In other calendars
- Hebrew
-
4133 / 4134 AM
Rosh Hashanah falls in September/October.
- 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
-
916 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
365 / 366 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
295 / 294 Saka
Indian national calendar; year starts in March.
Properties
Primality
373 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√373 = [19; (3, 5, 5, 3, 38)]
Period length 5 — the block in parentheses repeats forever.
Representations
- In words
- three hundred seventy-three
- Ordinal
- 373rd
- Roman numeral
- CCCLXXIII
- Binary
- 101110101
- Octal
- 565
- Hexadecimal
- 0x175
- Base64
- AXU=
- One's complement
- 65,162 (16-bit)
- Scientific notation
- 3.73 × 10²
- As a duration
- 373 s = 6 minutes, 13 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- τογʹ
- Mayan (base 20)
- 𝋲·𝋭
- Chinese
- 三百七十三
- Chinese (financial)
- 參佰柒拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 373 = 8
- e — Euler's number (e)
- Digit 373 = 7
- φ — Golden ratio (φ)
- Digit 373 = 0
- √2 — Pythagoras's (√2)
- Digit 373 = 7
- ln 2 — Natural log of 2
- Digit 373 = 7
- γ — Euler-Mascheroni (γ)
- Digit 373 = 8
Also seen as
UTF-8 encoding: C5 B5 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.117.
- Address
- 0.0.1.117
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.117
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 373 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F♯4 (370 Hz, +14¢)
- Scientific pitch (C4 = 256 Hz): G4 (383.6 Hz, -48¢ — about midway to F♯4)
- Baroque pitch (A4 = 415 Hz): G4 (369.7 Hz, +15¢)
373 K is essentially the boiling point of water (100 °C = 373.15 K).
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.