Properties of the Number 47900

Forty-Seven Thousand Nine Hundred

Basics

Value: 47899 → 47900 → 47901

Parity: even

Prime: No

Previous Prime: 47881

Next Prime: 47903

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 ² × 479

Divisors: 1, 2, 4, 5, 10, 20, 25, 50, 100, 479

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1011101100011100

Octal: 135434

Duodecimal: 23878

Hexadecimal: bb1c

Square: 2294410000

Square Root: 218.8606862823929

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

Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = ψ(n) - n and ψ(n) = A001615(n) is the Dedekind ψ function. A323330

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero. A205198

G.f. A(x) satisfies A(x)² = A(x²) / (1 - 2·x)² with A(0)=1. A372957

Number of non-isomorphic maximal independent sets of the n-cycle graph. A127685

Difference between prime(Fibonacci(n+1)) and prime(Fibonacci(n)). A343256

Number of (n+1)X3 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero. A205195

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 737", based on the 5-celled von Neumann neighborhood. A273480

Numbers k such that Bernoulli number B_k has denominator 33330. A295589

a(1) = 8; for n > 1, a(n+1) = a(n) * sum of digits of a(n). A47900