Properties of the Number 86812

Eighty-Six Thousand Eight Hundred Twelve

Basics

Value: 86811 → 86812 → 86813

Parity: even

Prime: No

Previous Prime: 86783

Next Prime: 86813

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 11 × 1973

Divisors: 1, 2, 4, 11, 22, 44, 1973, 3946, 7892, 21703

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101001100011100

Octal: 251434

Duodecimal: 422A4

Hexadecimal: 1531c

Square: 7536323344

Square Root: 294.63876187630166

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) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 1,0 0,-1 1,2 or -1,1. A264583

p-INVERT of the positive integers, where p(S) = 1 - 4·S + 2·S². A291183

Number of upper triangulations of the Koch chain K_s. A352496

Number of (4+1)X(n+1) arrays of permutations of 0..n·5+4 with each element having directed index change 1,0 0,-1 1,2 or -1,1. A264587

Integers k such that there exists an integer 0<m<k such that σ(m)² + σ(k)² = 2*(m+k)². A385008

Number of symmetric invertible n X n matrices over GF(2). A86812