Properties of the Number 87617

Eighty-Seven Thousand Six Hundred Seventeen

Basics

Value: 87616 → 87617 → 87618

Parity: odd

Prime: No

Previous Prime: 87613

Next Prime: 87623

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 41 × 2137

Divisors: 1, 41, 2137, 87617

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011001000001

Octal: 253101

Duodecimal: 42855

Hexadecimal: 15641

Square: 7676738689

Square Root: 296.00168918436935

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

n times n+5 gives the concatenation of two numbers m and m+3. A116310

a(n) = 64·n² + 1. A158686

Consider the mapping f(a/b) = (a²+b²)/(a²-b²) from rationals to rationals. Starting with 2/1 (a=2, b=1) and applying the mapping to each new (reduced) rational number gives 2/1, 5/3, 17/8, 353/225, ... . Sequence gives values of the numerators. A81465

Numbers of the form n² + 1 without prime divisors of the form a² + 1. A217279

Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A301395

Gabcke sequence: a(0)=1; (n+1) a(n+1) = ∑_k=0..n 2^4k+1 |E(2k+2)| a(n-k), where |E(2k+2)| are Euler numbers (E(2k)=(-1)^k A000364(k)). A87617

Congruent number sequence starting from the Pythagorean triple (3,4,5). A358210