Properties of the Number 19779

Nineteen Thousand Seven Hundred Seventy-Nine

Basics

Value: 19778 → 19779 → 19780

Parity: odd

Prime: No

Previous Prime: 19777

Next Prime: 19793

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 19 × 347

Divisors: 1, 3, 19, 57, 347, 1041, 6593, 19779

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110101000011

Octal: 46503

Duodecimal: B543

Hexadecimal: 4d43

Square: 391208841

Square Root: 140.63783274780653

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 dominating sets in the n-Sierpinski gasket graph. A347508

Numbers n such that 3·10ⁿ + 2·R_n - 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A102966

G.f.: ∏_k>=1 (1 + x^k) / (1 - x^k*(k+1)). A280424

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 1, 0), (-1, 1, 1), (1, 0, 0)}. A148548

Decimal expansion of sqrt(e)/6. A19779

Number of (n+2)X3 binary arrays with no 3X3 subblock commuting with any horizontal or vertical neighbor 3X3 subblock. A186798