999,664

2⁴ × 43 × 1453

Starting at 999,664, the Collatz iteration reaches 1 after 139 steps. The first transition is 499832; the starting value is even with 20 positive divisors.

Prime Factor Structure

Factorization String 2^4 × 43 × 1453

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 20

Divisor Sum (σ) 1,983,256

Proper Divisor Sum 983,592

Digit Sum / Digital Root 43 (Root: 7)

Adjacent Primes #999653 ← → #999667

Radix Representation

Decimal	999664
Binary	11110100000011110000 (20 bits)
Octal	0o3640360
Hexadecimal	0xF40F0

Divisor Catalog (20)

Collatz Trajectory (139 steps to reach 1)

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

999,664 499,832 249,916 124,958 62,479 187,438 93,719 281,158 140,579 421,738 210,869 632,608 316,304 158,152 79,076 39,538 19,769 59,308 29,654 14,827 44,482 22,241 66,724 33,362 16,681 50,044 25,022 12,511 37,534 18,767 56,302 28,151 84,454 42,227 126,682 63,341 190,024 95,012 47,506 23,753 71,260 35,630 17,815 53,446 26,723 80,170 40,085 120,256 60,128 30,064 15,032 7,516 3,758 1,879 5,638 2,819 8,458 4,229 12,688 6,344

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