Properties of the Number -7687

Six Hundred Eighty-Seven

Basics

Value: -7688 → -7687 → -7686

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7687

Divisors: 1, 7687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111000000111

Octal: -17007

Duodecimal: -4547

Hexadecimal: -1e07

Square: 59089969

Square Root: 87.67553820764375

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

Numerators of the partial alternating sums of the reciprocals of the powerfree part function (A055231). A379581

Primes of the form 2·n² - 1. A66436

Primes congruent to 2 mod 29. A141978

Irregular primes with irregularity index three. A60975

T(n,k)=Unmatched value maps: number of nXk binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..2 nXk array. A219410

Primes of the form 8·k² - 1. A90684

Mother primes of order 10. A136069

Conjectured number of numbers that are not the sum of three n-gonal numbers, or -1 if infinite. A118279

Number A(n,k) of n-digit biquanimous strings using digits {0,1,...,k}; square array A(n,k), n>=0, k>=0, read by antidiagonals. A288638

Primes having only {6, 7, 8, 9} as digits. A106111