Properties of the Number 27954

Twenty-Seven Thousand Nine Hundred Fifty-Four

Basics

Value: 27953 → 27954 → 27955

Parity: even

Prime: No

Previous Prime: 27953

Next Prime: 27961

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 1553

Divisors: 1, 2, 3, 6, 9, 18, 1553, 3106, 4659, 9318

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110100110010

Octal: 66462

Duodecimal: 14216

Hexadecimal: 6d32

Square: 781426116

Square Root: 167.1944975171133

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

Triangle read by rows: T(n,g) is the number of rooted maps with n edges on an orientable surface of genus g. A269919

Number of rooted genus-2 maps with n edges. A6301

Triangle T(n,k) read by rows: T(n,k) is the number of rooted genus-k maps with n edges, n>=0, 0<=k<=n. A238396

Number of ways of seating n people around a table for the second time without anyone sitting next to the same person as they did the first time. A89222

G.f. satisfies: A(x) = ∑_n>=0 xⁿ*A(x)ⁿ / ∏_k=1..n (1 - k·x). A225293

The number of ways of seating n people around a table for the second time so that k pairs are maintained. T(n,k) read by rows. A326390

Expansion of ∏_k>=1 (∏_j=1..k 1/(1 - x^k·j)^k·j). A327068

Triangle read by rows: T(n,k) is the number of permutations of k elements from [1..n] in a circle where adjacent values cannot be consecutive modulo n, rotations are distinct. A338849

Number of line segments connecting exactly 4 points in an n·n grid of points. A177720

a(n) = 81·n² - 69·n + 24. A304616