1397
1397 is the year the Kalmar Union joined Denmark, Norway and Sweden.
- Odd
- Composite
Where 1397 fits
Why 1397 is special
One monarch ruled all three Scandinavian kingdoms for over a century. Sweden's departure in 1523 is still marked as its national day.
Factors & digit properties
- Divisors (4)
- 1, 11, 127, 1397
- Prime factorisation
- 11 × 127
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 1397
- Binary
- 10101110101
- Octal
- 2565
- Hexadecimal
- 575
- Roman numeral
- MCCCXCVII
- Scientific notation
- 1.397 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Poland and Lithuania joined in 1386 and the Kalmar Union combined three Scandinavian kingdoms in 1397. Both created very large composite states by dynastic arrangement rather than conquest.
View 1386 →Numbers Around Us
- appears alongside1386
why?
Strength 0.50, confidence "high".
History
The Kalmar Union of 1397 placed Denmark, Norway and Sweden under a single monarch. Sweden's exit in 1523 is commemorated as its national day, which indicates how the union was remembered there.
DocumentedHistoryGeography: ScandinaviaPeriod: 1397–1523
Common questions
Is 1397 a prime number?
No, 1397 is not prime.
What are the factors of 1397?
The factors of 1397 are 1, 11, 127, 1397.
What is 1397 in Roman numerals?
1397 in Roman numerals is MCCCXCVII.
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: 3 August 2026