ℕ atory
Play Now

Properties of the Number -6887

Eight Hundred Eighty-Seven

Basics

Value: -6888 → -6887 → -6886

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 71 × 97

Divisors: 1, 71, 97, 6887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -1101011100111

Octal: -15347

Duodecimal: -3B9B

Hexadecimal: -1ae7

Square: 47430769

Square Root: 82.98795093265046

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

L.g.f.: log( ∑n>=0 xn2 ), the log of the characteristic function of the squares. A162552
First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 261", based on the 5-celled von Neumann neighborhood. A271064
Number of condensed integer partitions of n. A239312
a(n) = 4·a(n-1) - a(n-2) + 1, with a(0) = 0, a(1) = 2. A1571
Composite numbers such that the square mean of their prime factors is a nonprime integer (where the prime factors are taken with multiplicity and the square mean of c and d is sqrt((c2+d2)/2)). A134602
Composite and every divisor (except 1) contains the digit 7. A62676
a(n) = 9·a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 9. A87798
Integers k such that 10k - 23 is a prime number. A108328
Consider all permutations pi of the first n primes; a(n) is the minimum over pi of the maximal product of two adjacent primes in the permutation. A332765
Greatest semiprime whose prime indices sum to n. A339115