Numberwise

6397

NGC 6397 is one of the two closest globular clusters.

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Where 6397 fits

Where 6397 fits: Mathematics, Related numbersMathematics: Prime. Related numbers: 5139.MathematicsPrimeRelated numbers51396397
6397 connects to 2 worlds: mathematics, related numbers.

Why 6397 is special

Its proximity lets telescopes resolve individual faint white dwarfs, which is how the cluster's age — and a lower bound on the galaxy's — has been measured.

6397 is part of

Prime numbers

Factors & digit properties

Divisors (2)
1, 6397
Prime factorisation
6397
Digit sum
25
Digital root
7

Representations

Decimal
6397
Scientific notation
6.397 × 10^3

Roman numerals

Roman numerals as modelled here goes up to 3,999.

Binary

1 1 0 0 0 1 1 1 1 1 1 0 1

1 × 4,096 + 1 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 6,397

Octal

1 4 3 7 5

1 × 4,096 + 4 × 512 + 3 × 64 + 7 × 8 + 5 × 1 = 6,397

Hexadecimal

1 8 f d

1 × 4,096 + 8 × 256 + f × 16 + d × 1 = 6,397

Read as powers of two: 4,096 + 2,048 + 128 + 64 + 32 + 16 + 8 + 4 + 1 = 6,397.

In historical numeral systems

Egyptian

6 lotuses, 3 coils of rope, 9 hobbles, 7 strokes

6 × 1,000 + 3 × 100 + 9 × 10 + 7 × 1 = 6,397. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.

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

Related numbers & connections

Connection
Both are unusually close globular clusters, which is what allows their individual faint stars to be resolved and dated.

Both are unusually close globular clusters, which is what allows their individual faint stars to be resolved and dated.

View 5139 →

Other connections

  • is associated with5139
    why?

    Strength 0.50, confidence "high".

How is 6397 connected to another number? →

Science

  • NGC 6397 lies roughly 7,800 light years away. Observations reaching its faintest white dwarfs allow cooling-age estimates that constrain the age of the Galactic halo.

    DocumentedSciencePeriod: 1751–

Common questions

Is 6397 a prime number?

Yes, 6397 is prime — it has exactly two positive divisors: 1 and itself.

What are the factors of 6397?

The factors of 6397 are 1, 6397.

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