Properties of the Number 61491

Sixty-One Thousand Four Hundred Ninety-One

Basics

Value: 61490 → 61491 → 61492

Parity: odd

Prime: No

Previous Prime: 61487

Next Prime: 61493

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 103 × 199

Divisors: 1, 3, 103, 199, 309, 597, 20497, 61491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000000110011

Octal: 170063

Duodecimal: 2B703

Hexadecimal: f033

Square: 3781143081

Square Root: 247.97378893746009

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

T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors. A283282

Number of n-length words w over binary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z. A213290

a(0) = 1, a(1) = 2; for n>1, a(n) = a(n-1) + a(n-2) + 4. A182415

Number of n X 3 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors. A283277

Number of nX6 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors. A283280

Numbers whose base-4 representation contains exactly four 0's and four 3's. A45085

a(1) = 1, a(n) = least number such that the concatenation a(n)a(n-1)...a(1) is a cube. A61491