Properties of the Number 90842

Ninety Thousand Eight Hundred Forty-Two

Basics

Value: 90841 → 90842 → 90843

Parity: even

Prime: No

Previous Prime: 90841

Next Prime: 90847

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 53 × 857

Divisors: 1, 2, 53, 106, 857, 1714, 45421, 90842

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110001011011010

Octal: 261332

Duodecimal: 446A2

Hexadecimal: 162da

Square: 8252268964

Square Root: 301.40006635699336

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 connected triangle-free graphs on n unlabeled nodes. A24607

Triangle read by rows: T(n,k) gives number of connected graphs on n nodes with clique number n-k, (n>=2, k=0..n-2). A126744

Number T(n,k) of triangle-free graphs on n unlabeled nodes with exactly k connected components; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A283417

a(n) = A005117(A390138(n) + 1). A390241

Square array of numbers read by antidiagonals where T(n,k) = ((k+3)*(k+2)ⁿ-2)/(k+1). A90842