698
698 is a composite number, even, a calendar year.
Historical context — 698 AD
Calendar year
Year 698 (DCXCVIII) was a common year starting on Tuesday of the Julian calendar.
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Historical context — 698 BC
Decade
This article concerns the period 699 BC – 690 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
-
Saturday
January 1, 698
- Ended on
-
Saturday
December 31, 698
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
690s
690–699
- Century
-
7th century
601–700
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,328
1328 years before 2026.
In other calendars
- Hebrew
-
4458 / 4459 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
78 / 79 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dog
Sexagenary cycle position 35 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1241 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
76 / 77 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
690 / 691 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
620 / 619 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 23
- Digit product
- 432
- Digital root
- 5
- Palindrome
- No
- Bit width
- 10 bits
- Reversed
- 896
- Flips to (rotate 180°)
- 869
- Recamán's sequence
- a(2,228) = 698
- Square (n²)
- 487,204
- Cube (n³)
- 340,068,392
- Divisor count
- 4
- σ(n) — sum of divisors
- 1,050
- φ(n) — Euler's totient
- 348
- Sum of prime factors
- 351
Primality
Prime factorization: 2 × 349
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- six hundred ninety-eight
- Ordinal
- 698th
- Roman numeral
- DCXCVIII
- Binary
- 1010111010
- Octal
- 1272
- Hexadecimal
- 0x2BA
- Base64
- Aro=
- One's complement
- 64,837 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- χϟηʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋲
- Chinese
- 六百九十八
- Chinese (financial)
- 陸佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 698 = 9
- e — Euler's number (e)
- Digit 698 = 2
- φ — Golden ratio (φ)
- Digit 698 = 1
- √2 — Pythagoras's (√2)
- Digit 698 = 0
- ln 2 — Natural log of 2
- Digit 698 = 4
- γ — Euler-Mascheroni (γ)
- Digit 698 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 698, here are decompositions:
- 7 + 691 = 698
- 37 + 661 = 698
- 67 + 631 = 698
- 79 + 619 = 698
- 97 + 601 = 698
- 127 + 571 = 698
- 151 + 547 = 698
- 157 + 541 = 698
Showing the first eight; more decompositions exist.
UTF-8 encoding: CA BA (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.186.
- Address
- 0.0.2.186
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.186
Unspecified address (0.0.0.0/8) — "this network" placeholder.