643639

Prime Factor Structure

Factorization String 643639

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 643,640

Proper Divisor Sum 1

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #643633 ← → #643649

1 643,639

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

643,639 1,930,918 965,459 2,896,378 1,448,189 4,344,568 2,172,284 1,086,142 543,071 1,629,214 814,607 2,443,822 1,221,911 3,665,734 1,832,867 5,498,602 2,749,301 8,247,904 4,123,952 2,061,976 1,030,988 515,494 257,747 773,242 386,621 1,159,864 579,932 289,966 144,983 434,950 217,475 652,426 326,213 978,640 489,320 244,660 122,330 61,165 183,496 91,748 45,874 22,937 68,812 34,406 17,203 51,610 25,805 77,416 38,708 19,354 9,677 29,032 14,516 7,258 3,629 10,888 5,444 2,722 1,361 4,084

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