1,917
1,917 is a composite number, odd, a calendar year.
Notable events — 1917 AD
- Mar 15 Tsar Nicholas II abdicates as the February Revolution ends Russian autocracy.
- Apr 6 The United States declares war on Germany, entering World War I.
- Jul 31 The Battle of Passchendaele begins.
- Nov 2 The Balfour Declaration backs a Jewish homeland in Palestine.
- Nov 7 Bolsheviks led by Lenin seize power in the October Revolution.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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, 1917
- Ended on
-
Monday
December 31, 1917
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 8
Sunday, April 8, 1917
- Decade
-
1910s
1910–1919
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
109
109 years before 2026.
In other calendars
- Hebrew
-
5677 / 5678 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1335 / 1336 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Snake
Sexagenary cycle position 54 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2460 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1295 / 1296 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1909 / 1910 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1839 / 1838 Saka
Indian national calendar; year starts in March.
- Japanese
-
Taishō 6
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 63
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 7,191
- Recamán's sequence
- a(7,910) = 1,917
- Square (n²)
- 3,674,889
- Cube (n³)
- 7,044,762,213
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,880
- φ(n) — Euler's totient
- 1,260
- Sum of prime factors
- 80
Primality
Prime factorization: 3 3 × 71
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred seventeen
- Ordinal
- 1917th
- Roman numeral
- MCMXVII
- Binary
- 11101111101
- Octal
- 3575
- Hexadecimal
- 0x77D
- Base64
- B30=
- One's complement
- 63,618 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡιζʹ
- Mayan (base 20)
- 𝋤·𝋯·𝋱
- Chinese
- 一千九百一十七
- Chinese (financial)
- 壹仟玖佰壹拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,917 = 9
- e — Euler's number (e)
- Digit 1,917 = 0
- φ — Golden ratio (φ)
- Digit 1,917 = 9
- √2 — Pythagoras's (√2)
- Digit 1,917 = 9
- ln 2 — Natural log of 2
- Digit 1,917 = 1
- γ — Euler-Mascheroni (γ)
- Digit 1,917 = 3
Also seen as
UTF-8 encoding: DD BD (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.125.
- Address
- 0.0.7.125
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.125
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1917 first appears in π at position 1,944 of the decimal expansion (the 1,944ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.