Number 91
The number 91 is the 13th triangular number. It has 4 divisors and a digital root of 1. Explore its full properties below, or find words and phrases with a gematria value of 91.
91
Divisors: 4
1, 7, 13, 91
Sum: 112
Prev Triangular: 78
13th Triangular Number
Next Triangular: 105
Mathematical Properties
Golden Numbern/a
Reduced Digit Sum1
Magic Constant376,831
Digital Root1
Octaln/a(133)
Duodecimal109(77)
Hexadecimal145(5b)
Binary1011011
91st Values
Prime467
Triangular4,186
Square8,281
Star49,141
Pentagonal12,376
Cube753,571
Tetrahedral129,766
Square Pyramidal255,346
Fibonaccin/a
Harshad324
Happy Number680