393 = 12 × 3 + 45 × 6 + 78 + 9
393 = 98 + 7 × 6 × 5 + 43 + 21
393 = 0^8 − 1^9 + 2^6 − 3^7 + 4^5 + 5^3 + 6^4 + 7^1 + 8^2 + 9^0
Palindromic in bases 4 and 10.
Numbers k such that (35*10^k - 11)/3 is prime
Semiprime (Product of 2 Primes)
Factors: 1, 3, 131, 393
Representations, Binary to Hexadecimal:
110001001_2
112120_3
12021_4
3033_5
1453_6
1101_7
611_8
476_9
328_11
289_12
243_13
201_14
1b3_15
189_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
