3² × 19 × 53 × 71

Prime Factor Structure

Factorization String 3^2 × 19 × 53 × 71

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 1,010,880

Proper Divisor Sum 367,407

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #643469 ← → #643493

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

643,473 1,930,420 965,210 482,605 1,447,816 723,908 361,954 180,977 542,932 271,466 135,733 407,200 203,600 101,800 50,900 25,450 12,725 38,176 19,088 9,544 4,772 2,386 1,193 3,580 1,790 895 2,686 1,343 4,030 2,015 6,046 3,023 9,070 4,535 13,606 6,803 20,410 10,205 30,616 15,308 7,654 3,827 11,482 5,741 17,224 8,612 4,306 2,153 6,460 3,230 1,615 4,846 2,423 7,270 3,635 10,906 5,453 16,360 8,180 4,090

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