3³ × 131 × 181

Prime Factor Structure

Factorization String 3^3 × 131 × 181

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 960,960

Proper Divisor Sum 320,763

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #640193 ← → #640219

1 3 9 27 131 181 393 543 1,179 1,629 3,537 4,887 23,711 71,133 213,399 640,197

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

640,197 1,920,592 960,296 480,148 240,074 120,037 360,112 180,056 90,028 45,014 22,507 67,522 33,761 101,284 50,642 25,321 75,964 37,982 18,991 56,974 28,487 85,462 42,731 128,194 64,097 192,292 96,146 48,073 144,220 72,110 36,055 108,166 54,083 162,250 81,125 243,376 121,688 60,844 30,422 15,211 45,634 22,817 68,452 34,226 17,113 51,340 25,670 12,835 38,506 19,253 57,760 28,880 14,440 7,220 3,610 1,805 5,416 2,708 1,354 677

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