Properties of the Number 9909

Nine Thousand Nine Hundred Nine

Basics

Value: 9908 → 9909 → 9910

Parity: odd

Prime: No

Previous Prime: 9907

Next Prime: 9923

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 367

Divisors: 1, 3, 9, 27, 367, 1101, 3303, 9909

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010110101

Octal: 23265

Duodecimal: 5899

Hexadecimal: 26b5

Square: 98188281

Square Root: 99.54396013822235

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

Numbers in which 9 outnumbers all other digits together. A292739

Numbers whose set of base 10 digits is {0,9}. A97256

a(n) = n*(14·n - 11). A195021

The poor sandwiches sequence (see Comments lines for definition). A335600

T(n,k) = Number of (n+2) X (k+2) binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals. A202777

Numbers that are the sum of nine fourth powers in exactly seven ways. A345849

Numbers whose digits all belong to the same residue class mod 9. A385298

Triangle, read by rows, such that the diagonal (A084785) is the self-convolution of the first column (A084784) and the row sums (A084786) gives the differences of the diagonal and the first column. A84783

a(n) = (n-2)*(14·n-39) for n > 2, otherwise a(n) = n. A195030

Number of 5-cycles in the n-polygon diagonal intersection graph. A300553