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Cardinal | three hundred sixty-nine | |||

Ordinal | 369th (three hundred sixty-ninth) | |||

Factorization | 3^{2}× 41 | |||

Divisors | 1, 3, 9, 41, 123, 369 | |||

Greek numeral | ΤΞΘ´ | |||

Roman numeral | CCCLXIX | |||

Binary | 101110001_{2} | |||

Ternary | 111200_{3} | |||

Quaternary | 11301_{4} | |||

Quinary | 2434_{5} | |||

Senary | 1413_{6} | |||

Octal | 561_{8} | |||

Duodecimal | 269_{12} | |||

Hexadecimal | 171_{16} | |||

Vigesimal | I9_{20} | |||

Base 36 | A9_{36} |

**Three hundred sixty-nine** is the natural number following three hundred sixty-eight and preceding three hundred seventy.

## In mathematics

369 is the magic constant of the *9* × *9* magic square^{[1]}^{[2]} and the *n*-Queens Problem for *n* = 9.^{[2]}

There are 369 free octominoes (polyominoes of order 8).^{[3]}^{[4]}

## In other fields

**369** is also:

## References

**^**Kraitchik, M (1942). "Magic Squares".*Mathematical Recreations*. New York: Norton. pp. 142–192.- ^
^{a}^{b}Sequence A006003 in OEIS. **^**Redelmeier, D. Hugh (1981). "Counting polyominoes: yet another attack".*Discrete Mathematics*.**36**: 191–203. doi:10.1016/0012-365X(81)90237-5.**^**Sequence A000105 in OEIS.