λ
Sequence Observatory

9,171,895

5 × 89 × 20611
Deficient Odd Composite

Starting at 9,171,895, the Collatz iteration reaches 1 after 88 steps. The first transition is 27515686; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 5 × 89 × 20611
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 11,130,480
Proper Divisor Sum 1,958,585
Digit Sum / Digital Root 40 (Root: 4)
Adjacent Primes #9171887 ← → #9171907

Radix Representation

Decimal 9171895
Binary 100010111111001110110111 (24 bits)
Octal 0o42771667
Hexadecimal 0x8BF3B7

Divisor Catalog (8)

1 5 89 445 20,611 103,055 1,834,379 9,171,895

Collatz Trajectory (88 steps to reach 1)

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

9,171,895 27,515,686 13,757,843 41,273,530 20,636,765 61,910,296 30,955,148 15,477,574 7,738,787 23,216,362 11,608,181 34,824,544 17,412,272 8,706,136 4,353,068 2,176,534 1,088,267 3,264,802 1,632,401 4,897,204 2,448,602 1,224,301 3,672,904 1,836,452 918,226 459,113 1,377,340 688,670 344,335 1,033,006 516,503 1,549,510 774,755 2,324,266 1,162,133 3,486,400 1,743,200 871,600 435,800 217,900 108,950 54,475 163,426 81,713 245,140 122,570 61,285 183,856 91,928 45,964 22,982 11,491 34,474 17,237 51,712 25,856 12,928 6,464 3,232 1,616

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