Properties of the Number -623

Six Hundred Twenty-Three

Basics

Value: -624 → -623 → -622

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 7 × 89

Divisors: 1, 7, 89, 623

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001101111

Octal: -1157

Duodecimal: -43B

Hexadecimal: -26f

Square: 388129

Square Root: 24.95996794869737

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) = (-n³ + 9n² - 5n + 3)/3. A161702

Irregular triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of (1-x)/(x²-3x+1)). A328646

a(n) = n² - (n-1)² - (n-2)² - ... - 1². A179297

Partial sums of A073579. A77039

Expansion of (1-5·x-x²+x³)/((1+x)*(1-x)³). A141354

a(n) = 1 - 4·n - 4·n². A184882

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood. A270086

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 323", based on the 5-celled von Neumann neighborhood. A271256

Numerator generator for offsets from the quarter points of the Cantor ternary set to the center points of deleted middle thirds: 1 is in the list and if m is in the list -3m-4 and -3m+4 are in the list, which is ordered by absolute value. A355680

E.g.f. satisfies A(x) = exp(x * (1 + x)/A(x)³). A365040