Properties of the Number -188191

One Hundred Eighty-Eight Thousand One Hundred Ninety-One

Basics

Value: -188192 → -188191 → -188190

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 307 × 613

Divisors: 1, 307, 613, 188191

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -101101111100011111

Octal: -557437

Duodecimal: -90AA7

Hexadecimal: -2df1f

Square: 35415852481

Square Root: 433.8098661856367

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

Strong pseudoprimes to base 3. A20229

Numbers of the form p·q, p and q prime with q=2·p-1. A129521

Triangular numbers which are the product of two primes. A68443

Strong pseudoprimes to base 7. A20233

Odd numbers with increasing numbers of bases to which they are strong pseudoprimes. A141768

Composite numbers k == 5, 7 (mod 12) such that 3^(k-1/2) == -1 (mod k). A375918

a(n) = larger member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers. A185128

Odd numbers > 1, not powers of primes, for which A326147(n) is equal to abs(A326146(n)). A326148

Strong pseudoprimes to base 10. A20236

Numbers m such that exactly half of the a such that 0<a<m and (a,m)=1 satisfy a^m-1 == 1 (mod m). A191311