Properties of the Number -243

Two Hundred Forty-Three

Basics

Value: -244 → -243 → -242

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ⁵

Divisors: 1, 3, 9, 27, 81, 243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110011

Octal: -363

Duodecimal: -183

Hexadecimal: -f3

Square: 59049

Square Root: 15.588457268119896

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the Fibonacci self-fusion matrix (A202453). A202605

Scaled Chebyshev U-polynomials evaluated at sqrt(3)/2; expansion of 1/(1 - 3·x + 3·x²). A57083

Euler transform of negative integers. A73592

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of 2ⁿ-1 as Sum(k=0..n)T(n,k)*binomial(n,k). A244124

Values of n such that L(1) and N(1) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226921

Expansion of bracket function. A748

G.f.: ∑_n>=0 xⁿ*∑_k=0..n (-1)^k * C(n,k)² * ∑_j=0..k C(k,j)² * x^j. A245925

Deficiency computed for conjugated prime factorization: a(n) = A033879(A122111(n)). A323174

Nearest integer to n²*sin(n). A274087

Inverse Euler transform of the number of divisors function A000005. A320779