Properties of the Number 8690

Eight Thousand Six Hundred Ninety

Basics

Value: 8689 → 8690 → 8691

Parity: even

Prime: No

Previous Prime: 8689

Next Prime: 8693

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 11 × 79

Divisors: 1, 2, 5, 10, 11, 22, 55, 79, 110, 158

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111110010

Octal: 20762

Duodecimal: 5042

Hexadecimal: 21f2

Square: 75516100

Square Root: 93.22016949137134

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) = n*(9·n - 1)/2. A22266

T(n,k) is the number of (n+1) X (k+1) 0..1 matrices with each 2 X 2 permanent equal. A224745

Expansion of ∏_k>=1 (1 - x^k)¹¹. A10819

Expansion of (8+6·x)/(1-x)⁵. A190048

Number of acute triangles on a centered hexagonal grid of size n. A241224

Expansion of ∏_k>=1 ((1+x^k) / ((1-x^2·k-1) * (1-x^8·k-4))). A280908

The number of e-perfect numbers below 10ⁿ. A307822

a(1) = 1, a(n+1) is the smallest number such that there are n primes between a(n) and a(n+1) exclusive. A75342

Look at the first 10 digits of the sequence: they are all different. The same for the next 10. And the next 10, etc. This sequence is the slowest increasing one with that property. A97912

Partial sums of [A052938(n)²]. A162899