Properties of the Number 90409

Ninety Thousand Four Hundred Nine

Basics

Value: 90408 → 90409 → 90410

Parity: odd

Prime: No

Previous Prime: 90407

Next Prime: 90437

Digit Sum: 22

Digital Root: 4

Palindrome: Yes

Factorization: 11 × 8219

Divisors: 1, 11, 8219, 90409

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110000100101001

Octal: 260451

Duodecimal: 443A1

Hexadecimal: 16129

Square: 8173787281

Square Root: 300.68089397233075

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

Palindromic Smith numbers. A98834

Palindromes that start with 9. A43044

Palindromic composite numbers starting with a digit 9. A222729

Szeged index of the grid graph P₃ X P_n. A245827

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

Palindromes that are multiples of 11 and whose digit sum is also a multiple of 11. A346221

Number of bits in binary expansion of n-th nonprime. A163400

a(n) = (7·8ⁿ + 2*(-1)ⁿ)/9. A90409

Array read by downward antidiagonals: T(n,k) is the number of partitions of [n], n >= 1, k >= 1, into cycles labeled with positive integers, such that the labels sum to k. A388788