Properties of the Number 99918

Ninety-Nine Thousand Nine Hundred Eighteen

Basics

Value: 99917 → 99918 → 99919

Parity: even

Prime: No

Previous Prime: 99907

Next Prime: 99923

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 × 13 × 61

Divisors: 1, 2, 3, 6, 7, 9, 13, 14, 18, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000011001001110

Octal: 303116

Duodecimal: 499A6

Hexadecimal: 1864e

Square: 9983606724

Square Root: 316.09808604292436

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

Numbers without comma-successors: these are the numbers k such that if the commas sequence A121805 is started at k instead of 1, there is no second term. A367341

Number of fullerenes with 2n vertices (or carbon atoms). A7894

Numbers k such that (1/k) * ∑_d∣k d*σ(d) is an integer. A69520

a(n) = A000203(n) * A024916(n). A143238

Numbers n such that for every k = 1, 2, ..., A305706(n)-1, it is possible to insert plus signs into the decimal representation of n^k to make sum equal n. A305707

a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 91. A93291

A Chebyshev transform related to the 7th cyclotomic polynomial. A99918