Properties of the Number 86981

Eighty-Six Thousand Nine Hundred Eighty-One

Basics

Value: 86980 → 86981 → 86982

Parity: odd

Prime: Yes

Previous Prime: 86969

Next Prime: 86993

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 86981

Divisors: 1, 86981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10101001111000101

Octal: 251705

Duodecimal: 42405

Hexadecimal: 153c5

Square: 7565694361

Square Root: 294.9254142999548

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

Let a(1)=1; for n>1, a(n)=nextprime((π/2)*a(n-1)). A84572

a(n) = smallest k where (10^k+1)=0 mod prime(n)², or 0 if no such k exists. A86981