3² × 257 × 277

Prime Factor Structure

Factorization String 3^2 × 257 × 277

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 932,412

Proper Divisor Sum 291,711

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #640691 ← → #640727

1 3 9 257 277 771 831 2,313 2,493 71,189 213,567 640,701

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

640,701 1,922,104 961,052 480,526 240,263 720,790 360,395 1,081,186 540,593 1,621,780 810,890 405,445 1,216,336 608,168 304,084 152,042 76,021 228,064 114,032 57,016 28,508 14,254 7,127 21,382 10,691 32,074 16,037 48,112 24,056 12,028 6,014 3,007 9,022 4,511 13,534 6,767 20,302 10,151 30,454 15,227 45,682 22,841 68,524 34,262 17,131 51,394 25,697 77,092 38,546 19,273 57,820 28,910 14,455 43,366 21,683 65,050 32,525 97,576 48,788 24,394

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.