Properties of the Number 90009

Ninety Thousand Nine

Basics

Value: 90008 → 90009 → 90010

Parity: odd

Prime: No

Previous Prime: 90007

Next Prime: 90011

Digit Sum: 18

Digital Root: 9

Palindrome: Yes

Factorization: 3 ² × 73 × 137

Divisors: 1, 3, 9, 73, 137, 219, 411, 657, 1233, 10001

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101111110011001

Octal: 257631

Duodecimal: 44109

Hexadecimal: 15f99

Square: 8101620081

Square Root: 300.01499962501873

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

Divisors of 99999999. A27890

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

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

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

Numbers n such that in n³ the parity of digits alternates. A30159

n-th row of the following triangle contains n palindromic multiples of n beginning with n. Sequence contains the triangle by rows. A83764

Palindromes that start with 9. A43044

Palindromic composite numbers starting with a digit 9. A222729

Numbers n with property that n² starts and ends with 81. A159775

Numbers such that each digit is the sum of two or more other digits. A203591