3 × 7 × 131 × 251

Prime Factor Structure

Factorization String 3 × 7 × 131 × 251

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,064,448

Proper Divisor Sum 373,947

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #690493 ← → #690509

1 3 7 21 131 251 393 753 917 1,757 2,751 5,271 32,881 98,643 230,167 690,501

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

690,501 2,071,504 1,035,752 517,876 258,938 129,469 388,408 194,204 97,102 48,551 145,654 72,827 218,482 109,241 327,724 163,862 81,931 245,794 122,897 368,692 184,346 92,173 276,520 138,260 69,130 34,565 103,696 51,848 25,924 12,962 6,481 19,444 9,722 4,861 14,584 7,292 3,646 1,823 5,470 2,735 8,206 4,103 12,310 6,155 18,466 9,233 27,700 13,850 6,925 20,776 10,388 5,194 2,597 7,792 3,896 1,948 974 487 1,462 731

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