961
961 is a composite number, odd, a calendar year.
Historical context — 961 AD
Calendar year
Year 961 (CMLXI) was a common year starting on Tuesday of the Julian calendar.
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Historical context — 961 BC
Decade
The 960s BC is a decade that lasted from 969 BC to 960 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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 961
- Ended on
-
Thursday
December 31, 961
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
960s
960–969
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,065
1065 years before 2026.
In other calendars
- Hebrew
-
4721 / 4722 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
349 / 350 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Rooster
Sexagenary cycle position 58 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1504 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
339 / 340 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
953 / 954 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
883 / 882 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 16
- Digit product
- 54
- Digital root
- 7
- Palindrome
- No
- Bit width
- 10 bits
- Reversed
- 169
- Flips to (rotate 180°)
- 196
- Recamán's sequence
- a(673) = 961
- Square (n²)
- 923,521
- Cube (n³)
- 887,503,681
- Square root (√n)
- 31
- Divisor count
- 3
- σ(n) — sum of divisors
- 993
- φ(n) — Euler's totient
- 930
- Sum of prime factors
- 62
Primality
Prime factorization: 31 2
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- nine hundred sixty-one
- Ordinal
- 961st
- Roman numeral
- CMLXI
- Binary
- 1111000001
- Octal
- 1701
- Hexadecimal
- 0x3C1
- Base64
- A8E=
- One's complement
- 64,574 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ϡξαʹ
- Mayan (base 20)
- 𝋢·𝋨·𝋡
- Chinese
- 九百六十一
- Chinese (financial)
- 玖佰陸拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 961 = 2
- e — Euler's number (e)
- Digit 961 = 4
- φ — Golden ratio (φ)
- Digit 961 = 6
- √2 — Pythagoras's (√2)
- Digit 961 = 1
- ln 2 — Natural log of 2
- Digit 961 = 3
- γ — Euler-Mascheroni (γ)
- Digit 961 = 7
Also seen as
UTF-8 encoding: CF 81 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.193.
- Address
- 0.0.3.193
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.193
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.