1,397
1,397 is a composite number, odd, a calendar year.
Notable events — 1397 AD
- Jun 17 The Kalmar Union unites Denmark, Norway, and Sweden under Margaret I.
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
-
Sunday
January 1, 1397
- Ended on
-
Sunday
December 31, 1397
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1390s
1390–1399
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
629
629 years before 2026.
In other calendars
- Hebrew
-
5157 / 5158 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
799 / 800 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
-
1940 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
775 / 776 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1389 / 1390 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1319 / 1318 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 11 × 127
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand three hundred ninety-seven
- Ordinal
- 1397th
- Roman numeral
- MCCCXCVII
- Binary
- 10101110101
- Octal
- 2565
- Hexadecimal
- 0x575
- Base64
- BXU=
- One's complement
- 64,138 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ατϟζʹ
- Mayan (base 20)
- 𝋣·𝋩·𝋱
- Chinese
- 一千三百九十七
- Chinese (financial)
- 壹仟參佰玖拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,397 = 9
- e — Euler's number (e)
- Digit 1,397 = 9
- φ — Golden ratio (φ)
- Digit 1,397 = 8
- √2 — Pythagoras's (√2)
- Digit 1,397 = 8
- ln 2 — Natural log of 2
- Digit 1,397 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,397 = 6
Also seen as
UTF-8 encoding: D5 B5 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.117.
- Address
- 0.0.5.117
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.117
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 1397 first appears in π at position 17,160 of the decimal expansion (the 17,160ordinal-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.