Properties of the Number -199981

One Hundred Ninety-Nine Thousand Nine Hundred Eighty-One

Basics

Value: -199982 → -199981 → -199980

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 37

Digital Root: 1

Palindrome: No

Factorization: 31 × 6451

Divisors: 1, 31, 6451, 199981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -110000110100101101

Octal: -606455

Duodecimal: -97891

Hexadecimal: -30d2d

Square: 39992400361

Square Root: 447.1923523496349

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 k equal to the number of 1's in the decimal digits of all numbers <= k. A14778

Structured disdyakis dodecahedral numbers (vertex structure 7). A100162

First term of a run of 10 consecutive numbers such that for each m in the 10-tuple exactly m 1's are used in writing out all numbers 1 through m. A94799

a(n) is the smallest number x > 1 such that n appears as a substring of the decimal representations of the numbers [0..x] exactly·times. A163500

Numbers k such that the number of times digit 'm' used for writing the decimal representation between 1 to k is equal to k for at least one value of m in the range m = 1 to 9. A216400

Base-ten n containing a digit making its n-th appearance in the list of consecutive positive integers. A339752

First quadrisection of A332843. A330522

Smallest k > 1 such that the total number of digits "1" required to write the numbers 1..k in base n is equal to k. A365097