Properties of the Number 91648

Ninety-One Thousand Six Hundred Forty-Eight

Basics

Value: 91647 → 91648 → 91649

Parity: even

Prime: No

Previous Prime: 91639

Next Prime: 91673

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ⁹ × 179

Divisors: 1, 2, 4, 8, 16, 32, 64, 128, 179, 256

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110011000000000

Octal: 263000

Duodecimal: 45054

Hexadecimal: 16600

Square: 8399355904

Square Root: 302.73420685479203

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 subsets of integers 1 through n (including the empty set) containing no pair of integers that share a common factor. A84422

Numbers whose prime indices and prime signature have the same mean. A359903

Number of subsets of {1, 2, ..., n} containing n and having pairwise coprime elements; also row sums of A186972. A186973

Expansion of 1/(1-4x-4x³). A89979

Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7. A252531

Strongly 2-near perfect numbers. A366172

Number of permutations of length n containing exactly 1 occurrence of 123 and 2 occurrences of 132. A224289

Decimal expansion of arccosh(sqrt(2)), the inflection point of sech(x). A91648

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 3 6 or 7. A252532

Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. A253038