Properties of the Number 86715

Eighty-Six Thousand Seven Hundred Fifteen

Basics

Value: 86714 → 86715 → 86716

Parity: odd

Prime: No

Previous Prime: 86711

Next Prime: 86719

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 41 × 47

Divisors: 1, 3, 5, 9, 15, 41, 45, 47, 123, 141

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101001010111011

Octal: 251273

Duodecimal: 42223

Hexadecimal: 152bb

Square: 7519491225

Square Root: 294.4741075205085

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) = 2·Farey(Fibonacci(n + 1)) - 3. A176500

Triangle read by row. T(n,m) gives the number of isomorphism classes of simple arrangements of n pseudolines and m double pseudolines in the projective plane. A180500

Numbers k such that k and k+1 both have the prime signature (2,1,1,1) (A189982). A336658

Number of simple mixed arrangements of 2 pseudolines and n double pseudolines in the projective plane. A191954

a(1) = 1, a(n) = floor((1/ω(n)!) * ∏_{p | n} 1 + (log n)/(log p)), where ω = A001221. A373738

Primes p such that A001414(p-1) and A001414(p+1) are both prime, where A001414 = sum of primes dividing n (with repetition). A86715

Decimal expansion of the constant C = minimum distance between the circumcenter and the excenter of an ex-bicentric quadrilateral whose sides are in an arithmetic progression 1 : 1+d : 1+2d : 1+3d. A214097