Properties of the Number 33687

Thirty-Three Thousand Six Hundred Eighty-Seven

Basics

Value: 33686 → 33687 → 33688

Parity: odd

Prime: No

Previous Prime: 33679

Next Prime: 33703

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 197

Divisors: 1, 3, 9, 19, 57, 171, 197, 591, 1773, 3743

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1000001110010111

Octal: 101627

Duodecimal: 175B3

Hexadecimal: 8397

Square: 1134813969

Square Root: 183.54018633530913

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

Integers of the form 8k+7 that can be written as a sum of four distinct squares of the form m, m+2, m+4, m+5, where m == 1 (mod 4). A243579

a(n) = k is a number such that A007535(k), the smallest pseudoprime to base k ( > k), is the n-th Carmichael number. A293563

G.f. A(x) = ∑_n>=0 a(n)*xⁿ where a(n) = ∑_k=0..n ( [x^k] A(2·x)ⁿ⁺¹ (mod 2ⁿ⁺¹) ) for n >= 0 with a(0) = 1. A371715

a(1)=1 then a(n)= (1/2) *(5·a(n-1)+1) if a(n-1) is odd, a(n)=3/2·a(n-1) otherwise. A86813

θ series of hexagonal lattice A₂ with respect to deep hole divided by 3. A33687

Number of defective 3-colorings of an n X 5 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order. A229634