Number
1,977
1,977 is a composite number, odd, a calendar year.
Notable events — 1977 AD
- Mar 27 Two 747s collide on a Tenerife runway, killing 583 in the deadliest aviation accident in history.
- May 25 Star Wars premieres in US theaters.
- Aug 16 Elvis Presley dies at Graceland, age 42.
- Aug 20 NASA launches Voyager 2 on a grand tour of the outer planets.
- Sep 5 NASA launches Voyager 1.
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
-
Saturday
January 1, 1977
- Ended on
-
Saturday
December 31, 1977
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 10
Sunday, April 10, 1977
- Decade
-
1970s
1970–1979
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
49
49 years before 2026.
In other calendars
- Hebrew
-
5737 / 5738 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1397 / 1398 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
-
2520 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1355 / 1356 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1969 / 1970 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1899 / 1898 Saka
Indian national calendar; year starts in March.
- Japanese
-
Shōwa 52
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 24
- Digit product
- 441
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 7,791
- Recamán's sequence
- a(3,797) = 1,977
- Square (n²)
- 3,908,529
- Cube (n³)
- 7,727,161,833
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,640
- φ(n) — Euler's totient
- 1,316
- Sum of prime factors
- 662
Primality
Prime factorization: 3 × 659
Divisors & multiples
Aliquot sum (sum of proper divisors):
663
First multiples
Sums & aliquot sequence
As consecutive integers:
988 + 989
658 + 659 + 660
327 + 328 + 329 + 330 + 331 + 332
Aliquot sequence:
1,977 → 663 → 345 → 231 → 153 → 81 → 40 → 50 → 43 → 1 → 0
— terminates at zero
Representations
- In words
- one thousand nine hundred seventy-seven
- Ordinal
- 1977th
- Roman numeral
- MCMLXXVII
- Binary
- 11110111001
- Octal
- 3671
- Hexadecimal
- 0x7B9
- Base64
- B7k=
- One's complement
- 63,558 (16-bit)
In other bases
ternary (3)
2201020
quaternary (4)
132321
quinary (5)
30402
senary (6)
13053
septenary (7)
5523
nonary (9)
2636
undecimal (11)
1538
duodecimal (12)
1189
tridecimal (13)
b91
tetradecimal (14)
a13
pentadecimal (15)
8bc
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡοζʹ
- Mayan (base 20)
- 𝋤·𝋲·𝋱
- Chinese
- 一千九百七十七
- Chinese (financial)
- 壹仟玖佰柒拾柒
In other modern scripts
Eastern Arabic
١٩٧٧
Devanagari
१९७७
Bengali
১৯৭৭
Tamil
௧௯௭௭
Thai
๑๙๗๗
Tibetan
༡༩༧༧
Khmer
១៩៧៧
Lao
໑໙໗໗
Burmese
၁၉၇၇
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,977 = 3
- e — Euler's number (e)
- Digit 1,977 = 2
- φ — Golden ratio (φ)
- Digit 1,977 = 0
- √2 — Pythagoras's (√2)
- Digit 1,977 = 8
- ln 2 — Natural log of 2
- Digit 1,977 = 7
- γ — Euler-Mascheroni (γ)
- Digit 1,977 = 9
Also seen as
Hex color
#0007B9
RGB(0, 7, 185)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.185.
- Address
- 0.0.7.185
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.185
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 1977 first appears in π at position 5,239 of the decimal expansion (the 5,239ordinal-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.