Properties of the Number 8905

Eight Thousand Nine Hundred Five

Basics

Value: 8904 → 8905 → 8906

Parity: odd

Prime: No

Previous Prime: 8893

Next Prime: 8923

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 13 × 137

Divisors: 1, 5, 13, 65, 137, 685, 1781, 8905

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10001011001001

Octal: 21311

Duodecimal: 51A1

Hexadecimal: 22c9

Square: 79299025

Square Root: 94.36630754670864

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

Triangle read by rows: T(n,k) = 140·k³*(n-k)³ - 14·k*(n-k) + 1; n >= 0, 0 <= k <= n. A300785

Zero, together with positive numbers k such that prime(k) + k is a square. A64371

Numbers k such that k * (k+1) is the concatenation of a number m with itself. A116285

Number of subsets of {1..n} whose root mean square is an integer. A339454

Fundamental discriminants d uniquely characterizing all complex biquadratic fields Q(sqrt(-3),sqrt(d)) which have 3-class group of type (3,3) and second 3-class group isomorphic to SmallGroup(729,95). A250239

Numbers k of the form a - b + c, such that k³ equals the decimal concatenation a//b//c and numbers k, b, and c have the same number of digits. A259379

Numbers n that are the product of three distinct odd primes and x² + y² = n has integer solutions. A264498

Number of odd strict trees of weight n (all outdegrees are odd). A300440

Numbers n such that prime(n) + n is a perfect power. A107605

Numbers k of the form abs(a - b + c - d) such that k⁴ equals the concatenation of a//b//c//d and numbers k,b,c,d have the same number of digits. A260193