Properties of the Number 7986

Seven Thousand Nine Hundred Eighty-Six

Basics

Value: 7985 → 7986 → 7987

Parity: even

Prime: No

Previous Prime: 7963

Next Prime: 7993

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 11 ³

Divisors: 1, 2, 3, 6, 11, 22, 33, 66, 121, 242

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100110010

Octal: 17462

Duodecimal: 4756

Hexadecimal: 1f32

Square: 63776196

Square Root: 89.36442245099556

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

Number of partitions of n in which the least part is even. A26805

Total sum of squares of parts in all partitions of n. A66183

Number A(n,k) of solid standard Young tableaux of shape [[n·k,n],[n]]; square array A(n,k), n>=0, k>=0, read by antidiagonals. A176129

Sums of successive Motzkin numbers. A5554

Number of normal multisets of size n with no permutation having all distinct run lengths. A386581

Numbers of the form (6ⁱ)*(11^j), with i, j >= 0. A108698

T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281653

a(n) = n*(n - 1)³/2. A19582

Number of chiral pairs of asymmetric polyominoes with n pentagonal cells of the hyperbolic regular tiling with Schläfli symbol {5,oo}. A389194

Numbers k such that φ(k) = φ(k - φ(k)). A51487