c

189 = 3 × 3 × 3 × 7

189 = 1 + 2 + 34 + 56 + 7 + 89

189 = 98 + 76 + 5 + 4 + 3 + 2 + 1

189 = 0^7 − 1^8 + 2^5 − 3^9 + 4^3 + 5^6 + 6^1 + 7^2 + 8^4 + 9^0

189 divides 55^2 - 1.

189 = (11 − 1 − 1) × (11 + 11 − 1)

189 = ((22 − 2)² − 22)/2

189 = (3 + 3)³ − 3³

189 = 444 − 4⁴ + 4/4

189 = 5 × (55 + 5) − 555/5

189 = 66 + 6 + 6 + 666/6

189 = (7 + 7) × (7 + 7) − 7

189 = 88 + 8888/88

189 = 99 + 99 − 9

Number k such that (7*10^k + 71)/3 is prime.

Factors: 1, 3, 7, 9, 21, 27, 63, 189

One hundred eighty-nine

Representations, Binary to Hexadecimal:

10111101_2
21000_3
2331_4
1224_5
513_6
360_7
275_8
230_9
162_11
139_12
117_13
d7_14
c9_15
bd_16

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