249
+249 is the international calling code for Sudan.
- Odd
- Composite
Where 249 fits
Why 249 is special
Sudan was Africa's largest country by area until South Sudan separated in 2011, the most recent successful secession to produce a UN member state.
Factors & digit properties
- Divisors (4)
- 1, 3, 83, 249
- Prime factorisation
- 3 × 83
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 249
- Scientific notation
- 2.490 × 10^2
Roman numerals
C C X L I X
CCXLIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 1 1 1 1 0 0 1
1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 249
Octal
3 7 1
3 × 64 + 7 × 8 + 1 × 1 = 249
Hexadecimal
f 9
f × 16 + 9 × 1 = 249
Read as powers of two: 128 + 64 + 32 + 16 + 8 + 1 = 249.
In historical numeral systems
Egyptian
2 coils of rope, 4 hobbles, 9 strokes
2 × 100 + 4 × 10 + 9 × 1 = 249. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
4 vertical wedges (sixties place), 9 vertical wedges (units place)
4 × 60 + 9 = 249. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sigma, then mu, then theta, marked as a numeral
sigma-mu-theta + keraia
sigma + mu + theta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
resh, then mem, then tet
resh-mem-tet
resh (200) + mem (40) + tet (9) = 249, written in descending order.
Maya
2 bars + 2 dots (upper, twenties place) over 1 bar + 4 dots (lower, units place)
12 × 20 + 9 = 249. 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
- Semiprime
Related numbers & connections
South Sudan seceded from Sudan in 2011 and was assigned +211 beside Sudan's +249. The two codes are a record of the most recent successful secession to produce a UN member state.
View 211 →Nearby in a sequence
- is adjacent to211
why?
Strength 0.50, confidence "high".
Geography
+249 reaches Sudan. It was the largest country in Africa until 2011, when South Sudan seceded and took a separate code, +211.
DocumentedGeographyGeography: Sudan
Common questions
Is 249 a prime number?
No, 249 is not prime.
What are the factors of 249?
The factors of 249 are 1, 3, 83, 249.
What is 249 in Roman numerals?
249 in Roman numerals is CCXLIX. IX is subtractive: one before ten — ten minus one. Written additively it would be CCXXXXVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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