1318 = 2 x 659.
1318 is a semiprime with a prime sum of factors: 2 + 659 = 661, a prime. 1318 is a semiprime that is 1 less than a prime, 1319.
1318 is a divisor of 557 - 1.
1318 is 414 in base 18.
1318 is the rectilinear crossing number of a complete graph of 19 nodes.
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