Properties of the Number 40309

Forty Thousand Three Hundred Nine

Basics

Value: 40308 → 40309 → 40310

Parity: odd

Prime: No

Previous Prime: 40289

Next Prime: 40343

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 173 × 233

Divisors: 1, 173, 233, 40309

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001110101110101

Octal: 116565

Duodecimal: 1B3B1

Hexadecimal: 9d75

Square: 1624815481

Square Root: 200.7710138441304

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) = a(n-1) - 2·a(n-2) with a(0) = 2, a(1) = 1. A2249

a(n) is the unique odd positive solution y of 2ⁿ = 7x² + y². A77021

Lucas pseudoprimes. A217120

Strong Lucas pseudoprimes. A217255

Semiperimeter of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse. A89549

Number of 0..5 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 6. A200466

Insert a dot after the first digit of a(n); this is now the beginning of the arithmetic mean of the digits used so far in the sequence. Lexicographically earliest sequence of distinct positive terms with this property. A335744

T(n,k)=Number of 0..k arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo (k+1). A200469

Inserting any digit between adjacent digits of prime p never yields another prime. A50805

Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 4Xn array. A221449