Properties of the Number 78981

Seventy-Eight Thousand Nine Hundred Eighty-One

Basics

Value: 78980 → 78981 → 78982

Parity: odd

Prime: No

Previous Prime: 78979

Next Prime: 78989

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 3761

Divisors: 1, 3, 7, 21, 3761, 11283, 26327, 78981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010010000101

Octal: 232205

Duodecimal: 39859

Hexadecimal: 13485

Square: 6237998361

Square Root: 281.03558493543125

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 factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487). A50341

Array read by antidiagonals: T(m,n) is the number of dominating induced trees in the grid graph P_m X P_n. A360846

Number of dominating induced trees in the n X n grid graph. A360847

Expansion of e.g.f. exp((g³ - 1)/3), where g = 1+x·g³ is the g.f. of A001764. A391557

a(n) = 5ⁿ + 7ⁿ + 9ⁿ. A74575

E.g.f. A(x) satisfies A(x) = exp(x) * C(x·A(x)), where C(x) = 1 + x·C(x)² is the g.f. of A000108. A381982

Expansion of 1/((1-3x)(1-5x)(1-7x)(1-11x)). A28062

Denominators of continued fraction convergents to sinh(1). A78981