Properties of the Number 11191

Eleven Thousand One Hundred Ninety-One

Basics

Value: 11190 → 11191 → 11192

Parity: odd

Prime: No

Previous Prime: 11177

Next Prime: 11197

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 19 ² × 31

Divisors: 1, 19, 31, 361, 589, 11191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10101110110111

Octal: 25667

Duodecimal: 6587

Hexadecimal: 2bb7

Square: 125238481

Square Root: 105.78752289377042

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

Multiples of 19 containing a 19 in their decimal representation. A121039

Numbers that are the sum of 7 positive 7th powers. A3374

a(n) = (2·n - 1)*(3·n² - 3·n + 2)/2. A63491

Number of inequivalent ways to color vertices of a regular tetrahedron using <= n colors. A6008

Numbers with multiplicative digital root value 9. A34056

26-gonal numbers: a(n) = n*(12·n-11). A255185

Square array A(n,k), read by descending antidiagonals, where A(1, k) = A388984(k), and for n > 1, A(n, k) = A003961(A(n-1), k). A388981

Number T(n,k) of colored compositions of n using all colors of a k-set such that all parts have different color patterns and the patterns for parts i are sorted and have i colors (in arbitrary order); triangle T(n,k), n>=0, 0<=k<=n, read by rows. A327673

Numbers of the form 12n+7 for which ∑_i=0..(4n+2) J(i,12n+7) = 0, where J(i,m) is the Jacobi symbol. A165463

Numbers using only digits 1 and 9. A284294