371
371 is a narcissistic number: 3³ + 7³ + 1³ = 27 + 343 + 1 = 371.
- Odd
- Composite
Where 371 fits
Why 371 is special
371 is narcissistic, and the second half of the only pair of consecutive three-digit narcissistic numbers — 370 immediately precedes it. It is also a semiprime, factoring as 7 × 53.
Factors & digit properties
- Divisors (4)
- 1, 7, 53, 371
- Prime factorisation
- 7 × 53
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 371
- Scientific notation
- 3.710 × 10^2
Roman numerals
C C C L X X I
Binary
1 0 1 1 1 0 0 1 1
1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 371
Octal
5 6 3
5 × 64 + 6 × 8 + 3 × 1 = 371
Hexadecimal
1 7 3
1 × 256 + 7 × 16 + 3 × 1 = 371
Read as powers of two: 256 + 64 + 32 + 16 + 2 + 1 = 371.
In historical numeral systems
Egyptian
3 coils of rope, 7 hobbles, 1 stroke
3 × 100 + 7 × 10 + 1 × 1 = 371. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
6 vertical wedges (sixties place), 1 corner wedge + 1 vertical wedge (units place)
6 × 60 + 11 = 371. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
tau, then omicron, then alpha, marked as a numeral
tau-omicron-alpha + keraia
tau + omicron + alpha written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
shin, then ayin, then alef
shin-ayin-alef
shin (300) + ayin (70) + alef (1) = 371, written in descending order.
Maya
3 bars + 3 dots (upper, twenties place) over 2 bars + 1 dot (lower, units place)
18 × 20 + 11 = 371. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Narcissistic (Armstrong) number
- Semiprime
Related numbers & connections
371 is the semiprime 7 × 53, so it is a multiple of 7.
View 7 →Estonia and Latvia are neighbours in a contiguous Baltic numbering run. Estonia has run binding internet voting in national elections since 2005.
View 372 →Mathematics
371 is a narcissistic (Armstrong) number: 3³ + 7³ + 1³ = 27 + 343 + 1 = 371. It follows 370, making the two the only consecutive three-digit narcissistic pair, and factors as the semiprime 7 × 53.
DocumentedMathematics
Common questions
Is 371 a prime number?
No, 371 is not prime.
What are the factors of 371?
The factors of 371 are 1, 7, 53, 371.
What is 371 in Roman numerals?
371 in Roman numerals is CCCLXXI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026