1,688,991

3 × 562997

1,688,991 factors as 3 × 562997. Its 4 positive divisors give a proper-divisor sum of 563,001, so this integer is deficient. The Collatz stopping time is 106 steps.

Prime Factor Structure

Factorization String 3 × 562997

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,251,992

Proper Divisor Sum 563,001

Digit Sum / Digital Root 42 (Root: 6)

Adjacent Primes #1688987 ← → #1689031

Radix Representation

Decimal	1688991
Binary	110011100010110011111 (21 bits)
Octal	0o6342637
Hexadecimal	0x19C59F

Divisor Catalog (4)

1 3 562,997 1,688,991

Collatz Trajectory (106 steps to reach 1)

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

1,688,991 5,066,974 2,533,487 7,600,462 3,800,231 11,400,694 5,700,347 17,101,042 8,550,521 25,651,564 12,825,782 6,412,891 19,238,674 9,619,337 28,858,012 14,429,006 7,214,503 21,643,510 10,821,755 32,465,266 16,232,633 48,697,900 24,348,950 12,174,475 36,523,426 18,261,713 54,785,140 27,392,570 13,696,285 41,088,856 20,544,428 10,272,214 5,136,107 15,408,322 7,704,161 23,112,484 11,556,242 5,778,121 17,334,364 8,667,182 4,333,591 13,000,774 6,500,387 19,501,162 9,750,581 29,251,744 14,625,872 7,312,936 3,656,468 1,828,234 914,117 2,742,352 1,371,176 685,588 342,794 171,397 514,192 257,096 128,548 64,274

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