3 × 23 × 37 × 251

Prime Factor Structure

Factorization String 3 × 23 × 37 × 251

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 919,296

Proper Divisor Sum 278,493

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #640793 ← → #640837

1 3 23 37 69 111 251 753 851 2,553 5,773 9,287 17,319 27,861 213,601 640,803

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

640,803 1,922,410 961,205 2,883,616 1,441,808 720,904 360,452 180,226 90,113 270,340 135,170 67,585 202,756 101,378 50,689 152,068 76,034 38,017 114,052 57,026 28,513 85,540 42,770 21,385 64,156 32,078 16,039 48,118 24,059 72,178 36,089 108,268 54,134 27,067 81,202 40,601 121,804 60,902 30,451 91,354 45,677 137,032 68,516 34,258 17,129 51,388 25,694 12,847 38,542 19,271 57,814 28,907 86,722 43,361 130,084 65,042 32,521 97,564 48,782 24,391

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