Properties of the Number 90909

Ninety Thousand Nine Hundred Nine

Basics

Value: 90908 → 90909 → 90910

Parity: odd

Prime: No

Previous Prime: 90907

Next Prime: 90911

Digit Sum: 27

Digital Root: 9

Palindrome: Yes

Factorization: 3 ³ × 7 × 13 × 37

Divisors: 1, 3, 7, 9, 13, 21, 27, 37, 39, 63

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110001100011101

Octal: 261435

Duodecimal: 44739

Hexadecimal: 1631d

Square: 8264446281

Square Root: 301.51119382205366

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) = Smallest nontrivial number k > 9 such that |first (leftmost) decimal digit of k - second digit + third digit - fourth digit ...| = n. A60982

Smallest number m such that first digit - second digit + third digit - fourth digit ... (of m) = n. A61479

a(n) = Smallest nontrivial number k > 9 such that first (leftmost) digit - second digit + third digit - fourth digit ... of k = n. A61882

Triangle of q-binomial coefficients for q=-10. A15123

Numbers m such that the largest digit in the decimal expansion of 1/m is 1. A333402

a(n) = floor(10⁶/n). A33426

Differences between two positive cubes in exactly 3 ways. A14441

a(n) = 9·a(n-1) + 10·a(n-2). A15585

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

a(n) = (1 - (-10)ⁿ)/11. A14992