Properties of the Number 99880

Ninety-Nine Thousand Eight Hundred Eighty

Basics

Value: 99879 → 99880 → 99881

Parity: even

Prime: No

Previous Prime: 99877

Next Prime: 99881

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 11 × 227

Divisors: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000011000101000

Octal: 303050

Duodecimal: 49974

Hexadecimal: 18628

Square: 9976014400

Square Root: 316.0379724020517

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

Number of n-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple n-stage cycling shift register; also number of binary irreducible polynomials whose degree divides n. A31

Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal binary arrays (n >= 1, k >= 1). A184271

Number of subsets of {1,2,...,n} which sum to 0 modulo n. A63776

Number of nonisomorphic circulant graphs, i.e., undirected Cayley graphs for the cyclic group of order n. A49287

Number of vertex-transitive graphs with n nodes. A6799

Number of locally disjoint rooted semi-identity trees with n unlabeled vertices. A331783

Number of Cayley graphs on n nodes. A185959

a(n) = (1/n) * ∑_{d divides n} (-1)^n+d*φ(n/d)*2^d. A74763

Number of circulant graphs on n vertices up to Cayley isomorphism. A285620

Bisection of A000031. A100447