Number

897

897 is a composite number, odd, a calendar year.

Arithmetic Number Cullen Number Deficient Number Evil Number Recamán's Sequence Sphenic Number Squarefree Year

Historical context — 897 AD

Calendar year

Year 897 (DCCCXCVII) was a common year starting on Saturday of the Julian calendar.

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Historical context — 897 BC

Decade

This article concerns the period 899 BC – 890 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: 52
Started on: Tuesday
January 1, 897
Ended on: Tuesday
December 31, 897
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 890s
890–899
Century: 9th century
801–900
Millennium: 1st millennium
1–1000
Years ago: 1,129
1129 years before 2026.

In other calendars

Hebrew: 4657 / 4658 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 283 / 284 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: 1440 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 275 / 276 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 889 / 890 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 819 / 818 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 24
Digit product: 504
Digital root: 6
Palindrome: No
Bit width: 10 bits
Reversed: 798
Recamán's sequence: a(413) = 897
Square (n²): 804,609
Cube (n³): 721,734,273
Divisor count: 8
σ(n) — sum of divisors: 1,344
φ(n) — Euler's totient: 528
Sum of prime factors: 39

Primality

Prime factorization: 3 × 13 × 23

Nearest primes: 887 (−10) · 907 (+10)

Divisors & multiples

All divisors (8)

1 · 3 · 13 · 23 · 39 · 69 · 299 · 897

Aliquot sum (sum of proper divisors): 447

Factor pairs (a × b = 897)

1 × 897

3 × 299

13 × 69

23 × 39

First multiples

897 · 1,794 (double) · 2,691 · 3,588 · 4,485 · 5,382 · 6,279 · 7,176 · 8,073 · 8,970

Sums & aliquot sequence

As consecutive integers: 448 + 449 298 + 299 + 300 147 + 148 + 149 + 150 + 151 + 152 63 + 64 + … + 75

Aliquot sequence: 897 → 447 → 153 → 81 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: eight hundred ninety-seven
Ordinal: 897th
Roman numeral: DCCCXCVII
Binary: 1110000001
Octal: 1601
Hexadecimal: 0x381
Base64: A4E=
One's complement: 64,638 (16-bit)

In other bases

ternary (3) 1020020

quaternary (4) 32001

quinary (5) 12042

senary (6) 4053

septenary (7) 2421

nonary (9) 1206

undecimal (11) 746

duodecimal (12) 629

tridecimal (13) 540

tetradecimal (14) 481

pentadecimal (15) 3ec

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ωϟζʹ
Mayan (base 20): 𝋢·𝋤·𝋱
Chinese: 八百九十七
Chinese (financial): 捌佰玖拾柒

In other modern scripts

Eastern Arabic ٨٩٧ Devanagari ८९७ Bengali ৮৯৭ Tamil ௮௯௭ Thai ๘๙๗ Tibetan ༨༩༧ Khmer ៨៩៧ Lao ໘໙໗ Burmese ၈၉၇

Digit at this position in famous constants

π — Pi (π): Digit 897 = 4
e — Euler's number (e): Digit 897 = 0
φ — Golden ratio (φ): Digit 897 = 5
√2 — Pythagoras's (√2): Digit 897 = 5
ln 2 — Natural log of 2: Digit 897 = 1
γ — Euler-Mascheroni (γ): Digit 897 = 7

Also seen as

Hex color

#000381

RGB(0, 3, 129)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.129.

Address: 0.0.3.129
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.129

Unspecified address (0.0.0.0/8) — "this network" placeholder.