Properties of the Number 47239

Forty-Seven Thousand Two Hundred Thirty-Nine

Basics

Value: 47238 → 47239 → 47240

Parity: odd

Prime: No

Previous Prime: 47237

Next Prime: 47251

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 97 × 487

Divisors: 1, 97, 487, 47239

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1011100010000111

Octal: 134207

Duodecimal: 23407

Hexadecimal: b887

Square: 2231523121

Square Root: 217.3453473162009

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

Number of 3 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. A69325

Number of 7 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. A69329

Numbers k such that φ(k) is a perfect sixth power. A78166

Array read by antidiagonals: T(m,n) is the number of m X n binary arrays with a path of adjacent 1's from upper right corner to lower left corner. A359575

Row sums of A285116: a(n) = 2 + ∑_k=1..(n-1) (C(n-1,k-1) bitwise-or C(n-1,k)), a(0) = 1, a(1) = 2. A285113

a(n) = 14 + floor( (1 + ∑_j=0..n-1 a(j)) / 2). A120141

a(n) = (4·9ⁿ + (-1)ⁿ)/5. A83302

Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = ∑_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - ∑_i=1..n p(i). A24850

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 59 ones. A31827

Numbers that are congruent to {1, 2} (mod 6). A47239