Properties of the Number -8647

Six Hundred Forty-Seven

Basics

Value: -8648 → -8647 → -8646

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 8647

Divisors: 1, 8647

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000111000111

Octal: -20707

Duodecimal: -5007

Hexadecimal: -21c7

Square: 74770609

Square Root: 92.98924669014154

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) = (5·2ⁿ⁺² - 3·n*2ⁿ - 2*(-1)ⁿ) / 18. A139790

Primes of the form k² - 2. A28871

Primes of the form k(k+1)/2+1 (i.e., central polygonal numbers, or one more than triangular numbers). A55469

The Wiener index of a benzenoid consisting of a linear chain of n hexagons. A143938

Lower prime of a pair of consecutive primes having a difference of 16. A31934

a(1) = 9; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A74345

a(n) = 4·n² + 4·n - 1. A73577

a(n) = (9·n² - 3·n + 2)/2. A80855

Mother primes of order 5. A136064

Where the prime race among 10k+1, ..., 10k+9 changes leader. A297408