2 × 7 × 67 × 683

Prime Factor Structure

Factorization String 2 × 7 × 67 × 683

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,116,288

Proper Divisor Sum 475,634

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #640649 ← → #640663

1 2 7 14 67 134 469 683 938 1,366 4,781 9,562 45,761 91,522 320,327 640,654

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

640,654 320,327 960,982 480,491 1,441,474 720,737 2,162,212 1,081,106 540,553 1,621,660 810,830 405,415 1,216,246 608,123 1,824,370 912,185 2,736,556 1,368,278 684,139 2,052,418 1,026,209 3,078,628 1,539,314 769,657 2,308,972 1,154,486 577,243 1,731,730 865,865 2,597,596 1,298,798 649,399 1,948,198 974,099 2,922,298 1,461,149 4,383,448 2,191,724 1,095,862 547,931 1,643,794 821,897 2,465,692 1,232,846 616,423 1,849,270 924,635 2,773,906 1,386,953 4,160,860 2,080,430 1,040,215 3,120,646 1,560,323 4,680,970 2,340,485 7,021,456 3,510,728 1,755,364 877,682

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