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Properties of the Number -7761

Seven Hundred Sixty-One

Basics

Value: -7762 → -7761 → -7760

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 13 × 199

Divisors: 1, 3, 13, 39, 199, 597, 2587, 7761

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1111001010001

Octal: -17121

Duodecimal: -45A9

Hexadecimal: -1e51

Square: 60233121

Square Root: 88.09653795694811

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

G.f. A(x) satisfies: A(x)9 = A(x3)3 + 9·x. A107089
L.g.f.: log(1 + ∑k>=1 prime(k)*xk) = ∑n>=1 a(n)*xn/n. A303073
a(n) = 10·binomial(n,2) + 9·n. A135705
"Sloping binary representation" of Fibonacci numbers, slope = +1. A37093
T(n,k)=Number of nXk binary arrays with every 1 having exactly two king-move neighbors equal to 1. A183450
T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 2,3,0,1,4 for x=0,1,2,3,4. A196493
Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of (1 + x1 + x2 + ... + xn + 1/x1 + 1/x2 + ... + 1/xn)k. A328718
a(n) = ∑k=0..n 2k * binomial(n,k)n. A336204
Integers k such that there exists an integer 0<m<k such that σ(m)2 + σ(k)2 = (m+k)2. A383484
Number of base 13 n-digit numbers with adjacent digits differing by one or less. A126367

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