Properties of the Number 80985

Eighty Thousand Nine Hundred Eighty-Five

Basics

Value: 80984 → 80985 → 80986

Parity: odd

Prime: No

Previous Prime: 80963

Next Prime: 80989

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 5399

Divisors: 1, 3, 5, 15, 5399, 16197, 26995, 80985

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110001011001

Octal: 236131

Duodecimal: 3AA49

Hexadecimal: 13c59

Square: 6558570225

Square Root: 284.5786358811919

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

Number of 6Xn 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A302684

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A302680

Define b by b(1) = 1 and for n>1, b(n) = b(n-1)+1/(2+1/b(n-1)); sequence gives denominator of b(n). A80985