640663

Prime Factor Structure

Factorization String 640663

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 640,664

Proper Divisor Sum 1

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #640649 ← → #640667

1 640,663

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

640,663 1,921,990 960,995 2,882,986 1,441,493 4,324,480 2,162,240 1,081,120 540,560 270,280 135,140 67,570 33,785 101,356 50,678 25,339 76,018 38,009 114,028 57,014 28,507 85,522 42,761 128,284 64,142 32,071 96,214 48,107 144,322 72,161 216,484 108,242 54,121 162,364 81,182 40,591 121,774 60,887 182,662 91,331 273,994 136,997 410,992 205,496 102,748 51,374 25,687 77,062 38,531 115,594 57,797 173,392 86,696 43,348 21,674 10,837 32,512 16,256 8,128 4,064

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