Properties of the Number 81097

Eighty-One Thousand Ninety-Seven

Basics

Value: 81096 → 81097 → 81098

Parity: odd

Prime: Yes

Previous Prime: 81083

Next Prime: 81101

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 81097

Divisors: 1, 81097

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10011110011001001

Octal: 236311

Duodecimal: 3AB21

Hexadecimal: 13cc9

Square: 6576723409

Square Root: 284.77535005684746

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

Primes from merging of 5 successive digits in decimal expansion of π. A104825

Number of stable towers of 2 X 2 LEGO blocks. A7575

Primes that remain prime through 4 iterations of function f(x) = 5·x + 6. A23315

Primes obtained from other primes by prefixing an 8. A290407

Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 7 (most significant digit on right). A61960

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27. A31615

Number of irreducible indecomposable spherical curves with n crossings (only ordinary double points), the circle is not oriented, the sphere is not oriented (UU case). A264759

a(n) = sum of numbers formed using the digits of next n numbers. A81993

Numbers n such that n²= (1/5)*(n+floor(sqrt(5)*n·floor(sqrt(5)*n))). A81097