369 = 1 × 234 + 56 + 7 + 8 × 9
369 = 9 + 8 + 7 + 6 × (54 + 3) + 2 + 1
369 = 0^4 − 1^6 + 2^8 − 3^9 + 4^7 + 5^5 + 6^3 + 7^1 + 8^2 + 9^0
369 = 12^2 + 15^2
369 divides 73^4 - 1.
Number k such that k^2 + 2 is prime
Magic Square, Numbers 1 to 81 and Sum 369
| 47 | 58 | 69 | 80 | 1 | 12 | 23 | 34 | 45 |
| 57 | 68 | 79 | 9 | 11 | 22 | 33 | 44 | 46 |
| 67 | 78 | 8 | 10 | 21 | 32 | 43 | 54 | 56 |
| 77 | 7 | 18 | 20 | 31 | 42 | 53 | 55 | 66 |
| 6 | 17 | 19 | 30 | 41 | 52 | 63 | 65 | 76 |
| 16 | 27 | 29 | 40 | 51 | 62 | 64 | 75 | 5 |
| 26 | 28 | 39 | 50 | 61 | 72 | 74 | 4 | 15 |
| 36 | 38 | 49 | 60 | 71 | 73 | 3 | 14 | 25 |
| 37 | 48 | 59 | 70 | 81 | 2 | 13 | 24 | 35 |
Factors: 1, 3, 9, 41, 123, 369
Representations, Binary to Hexadecimal:
101110001_2
111200_3
11301_4
2434_5
1413_6
1035_7
561_8
450_9
306_11
269_12
225_13
1c5_14
199_15
171_16
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