3³ × 61 × 389

Prime Factor Structure

Factorization String 3^3 × 61 × 389

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 967,200

Proper Divisor Sum 326,517

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #640669 ← → #640687

1 3 9 27 61 183 389 549 1,167 1,647 3,501 10,503 23,729 71,187 213,561 640,683

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

640,683 1,922,050 961,025 2,883,076 1,441,538 720,769 2,162,308 1,081,154 540,577 1,621,732 810,866 405,433 1,216,300 608,150 304,075 912,226 456,113 1,368,340 684,170 342,085 1,026,256 513,128 256,564 128,282 64,141 192,424 96,212 48,106 24,053 72,160 36,080 18,040 9,020 4,510 2,255 6,766 3,383 10,150 5,075 15,226 7,613 22,840 11,420 5,710 2,855 8,566 4,283 12,850 6,425 19,276 9,638 4,819 14,458 7,229 21,688 10,844 5,422 2,711 8,134 4,067

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