1,697
1,697 is a prime, odd, a calendar year.
1,697 (one thousand six hundred ninety-seven) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in Roman numerals it is MDCXCVII and in binary, 11010100001.
Interestingness
Notable events — 1697 AD
- Sep 20 The Treaty of Ryswick ends the Nine Years' War.
- Sep 11 Eugene of Savoy crushes the Ottomans at Zenta.
- Mar 9 Peter the Great begins his Grand Embassy to Western Europe.
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
-
Tuesday
January 1, 1697
- Ended on
-
Tuesday
December 31, 1697
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 7
Sunday, April 7, 1697
- Decade
-
1690s
1690–1699
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
329
329 years before 2026.
In other calendars
- Hebrew
-
5457 / 5458 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1108 / 1109 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Ox
Sexagenary cycle position 14 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2240 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1075 / 1076 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1689 / 1690 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1619 / 1618 Saka
Indian national calendar; year starts in March.
Properties
Primality
1,697 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,697 = [41; (5, 7, 3, 2, 3, 1, 9, 1, 1, 9, 1, 3, 2, 3, 7, 5, 82)]
Period length 17 — the block in parentheses repeats forever.
Representations
- In words
- one thousand six hundred ninety-seven
- Ordinal
- 1697th
- Roman numeral
- MDCXCVII
- Binary
- 11010100001
- Octal
- 3241
- Hexadecimal
- 0x6A1
- Base64
- BqE=
- One's complement
- 63,838 (16-bit)
- Scientific notation
- 1.697 × 10³
- As a duration
- 1,697 s = 28 minutes, 17 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αχϟζʹ
- Mayan (base 20)
- 𝋤·𝋤·𝋱
- Chinese
- 一千六百九十七
- Chinese (financial)
- 壹仟陸佰玖拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,697 = 1
- e — Euler's number (e)
- Digit 1,697 = 7
- φ — Golden ratio (φ)
- Digit 1,697 = 0
- √2 — Pythagoras's (√2)
- Digit 1,697 = 4
- ln 2 — Natural log of 2
- Digit 1,697 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,697 = 5
Also seen as
UTF-8 encoding: DA A1 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.161.
- Address
- 0.0.6.161
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.161
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,697 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯6 (1661.2 Hz, +37¢)
- Scientific pitch (C4 = 256 Hz): A6 (1722.2 Hz, -25¢)
- Baroque pitch (A4 = 415 Hz): A6 (1660 Hz, +38¢)
The digit sequence 1697 first appears in π at position 6,193 of the decimal expansion (the 6,193ordinal-suffix:rd 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.
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.