Properties of the Number 8665

Eight Thousand Six Hundred Sixty-Five

Basics

Value: 8664 → 8665 → 8666

Parity: odd

Prime: No

Previous Prime: 8663

Next Prime: 8669

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 1733

Divisors: 1, 5, 1733, 8665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10000111011001

Octal: 20731

Duodecimal: 5021

Hexadecimal: 21d9

Square: 75082225

Square Root: 93.08598175880189

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

Total number of parts in all partitions of n into prime parts. A84993

a(n) = ∑_k=1..n (lcm(n,n-1,...,n-k+2,n-k+1)/lcm(1,2,...,k)). A93431

a(n) = 6·n² + 1. A227776

a(1)=1; thereafter, a(n) is the smallest number such that both the addition and multiplication tables for (a(1),...,a(n)) contain n*(n+1)/2 different entries (the maximum possible). A337655

Triangle in which row n consists of the coefficients in ∑_m=0..n x^m * ∏_k=m+1..n (1-k·x), as read by rows. A248925

Antidiagonal sums of A086272 (and of A086273). A86274

a(n) = floor(2ⁿ/(n²)). A60505

Sum of n-th row of triangle of primes: 2; 2 3 2; 2 3 5 3 2; 2 3 5 7 5 3 2; ...; where n-th row contains 2n+1 terms. A61802

Average of squares of successive primes: a(n) = (prime(n+1)² + prime(n)²)/2, with n >= 2. A75892

Number of 3-element subsets of {1,...,n} whose sum has more than 3 divisors. A241564