Properties of the Number -209685

Two Hundred Nine Thousand Six Hundred Eighty-Five

Basics

Value: -209686 → -209685 → -209684

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 1997

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 1997, 5991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110011001100010101

Octal: -631425

Duodecimal: -A1419

Hexadecimal: -33315

Square: 43967799225

Square Root: 457.91374733676645

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = ∑_{k=0..floor(3·n/11)} binomial(3·n-10·k,k). A392350

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (-1, 1, 0), (1, -1, 0), (1, 1, 0)}. A149528