Properties of the Number 18287

Eighteen Thousand Two Hundred Eighty-Seven

Basics

Value: 18286 → 18287 → 18288

Parity: odd

Prime: Yes

Previous Prime: 18269

Next Prime: 18289

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 18287

Divisors: 1, 18287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011101101111

Octal: 43557

Duodecimal: A6BB

Hexadecimal: 476f

Square: 334414369

Square Root: 135.22943466568216

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

Primes p with p + 2 and prime(p) + 2 both prime. A236458

a(n) = smallest number with shortest addition chain of length n. A3064

Primes p such that there is no Carmichael number pqr, p<q<r q, r primes. A51663

Odd primes p such that φ(p+1) = φ(φ(p-2)+1). A271656

Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant. A117345

Smallest prime factor of A077586(n). A309130

Numbers n such that h(n) = 3 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.) A78420

Primes p such that x⁴¹ = 2 has a solution mod p, and p is congruent to 1 mod 41. A190758

Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and 2w+x+y>2. A211619

Numbers with largest ratio A003313(k)/log₂(k) in the range 2ⁿ < k < 2ⁿ⁺¹. A264803