3² × 71143

Prime Factor Structure

Factorization String 3^2 × 71143

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 924,872

Proper Divisor Sum 284,585

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #640279 ← → #640303

1 3 9 71,143 213,429 640,287

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

640,287 1,920,862 960,431 2,881,294 1,440,647 4,321,942 2,160,971 6,482,914 3,241,457 9,724,372 4,862,186 2,431,093 7,293,280 3,646,640 1,823,320 911,660 455,830 227,915 683,746 341,873 1,025,620 512,810 256,405 769,216 384,608 192,304 96,152 48,076 24,038 12,019 36,058 18,029 54,088 27,044 13,522 6,761 20,284 10,142 5,071 15,214 7,607 22,822 11,411 34,234 17,117 51,352 25,676 12,838 6,419 19,258 9,629 28,888 14,444 7,222 3,611 10,834 5,417 16,252 8,126 4,063

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