Properties of the Number 9680

Nine Thousand Six Hundred Eighty

Basics

Value: 9679 → 9680 → 9681

Parity: even

Prime: No

Previous Prime: 9679

Next Prime: 9689

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 ²

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010111010000

Octal: 22720

Duodecimal: 5728

Hexadecimal: 25d0

Square: 93702400

Square Root: 98.38699100999075

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·n². A33429

Concentric 20-gonal numbers. A195148

Four times second pentagonal numbers: a(n) = 2·n*(3·n+1). A33580

Numbers k such that φ(x) = k has exactly 11 solutions. A60674

a(n) = 20·n². A195322

a(n) = n + (n+1)² + (n+2)³. A27620

Products of form p⁴*q²*r where p, q and r are three distinct primes. A179669

Positive integers m such that π(m³) = π(j³) + π(k³) for some 0 < j <= k < m. A262409

a(n) = ∑_i=1..n (A077068(i) - A077065(i)). A232221

Alternating sum of hexagonal pyramidal numbers. A266677