Properties of the Number 11999

Eleven Thousand Nine Hundred Ninety-Nine

Basics

Value: 11998 → 11999 → 12000

Parity: odd

Prime: No

Previous Prime: 11987

Next Prime: 12007

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 13 ² × 71

Divisors: 1, 13, 71, 169, 923, 11999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111011011111

Octal: 27337

Duodecimal: 6B3B

Hexadecimal: 2edf

Square: 143976001

Square Root: 109.53994705129266

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

RATS: Reverse Add Then Sort the digits applied to previous term, starting with 29. A209880

Integers n of the form 8k+7 that are sum of distinct squares of the form m, m+1, m+2, m+4, where m == 1 (mod 4). A243578

A084015(n)/n. A84016

Numbers k such that σ(φ(k))-φ(σ(k)) is nonzero and is divisible by (k+1), that is A065395(k)/(k+1) = (φ(σ(k))-σ(φ(k)))/(k+1) is a nonzero integer. A92586

Numbers in cycles of RATS sequences. A161596

a(n) = 30·n² - 1. A158560

Numbers using only digits 1 and 9. A284294

Positive integers i for which A112049(i) == 7. A112067

Number of different n X n symmetric matrices with nonnegative entries summing to 4. Also number of symmetric oriented graphs with 4 arcs on n points. A139594

Indices of records in A353717. A353723