Properties of the Number 81706

Eighty-One Thousand Seven Hundred Six

Basics

Value: 81705 → 81706 → 81707

Parity: even

Prime: No

Previous Prime: 81703

Next Prime: 81707

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 40853

Divisors: 1, 2, 40853, 81706

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011111100101010

Octal: 237452

Duodecimal: 3B34A

Hexadecimal: 13f2a

Square: 6675870436

Square Root: 285.84261403786525

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

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero. A204840

Coefficients in the expansion of 1/([r]-[2·r]*x+[3·r]*x²-...); [ ]=floor, r=sqrt(8/3). A288233

Number of (n+1)X3 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero. A204834

Number of (n+1)X7 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero. A204838

Numbers n such that binary representation ends either in an odd number of ones followed by one zero or in an even number of ones. A81706