Properties of the Number -131209

One Hundred Thirty-One Thousand Two Hundred Nine

Basics

Value: -131210 → -131209 → -131208

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 10093

Divisors: 1, 13, 10093, 131209

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -100000000010001001

Octal: -400211

Duodecimal: -63B21

Hexadecimal: -20089

Square: 17215801681

Square Root: 362.22782885913114

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

a(n) = least k such that the remainder when 28^k is divided by k is n. A128368

Semiprimes in A103377. A103397

Semiprimes in A103380. A103400

Number of binary strings of length n with equal numbers of 00000 and 00101 substrings. A164182

a(n) = ∑_{k=1..floor(sqrt(n))} 2^floor(n/k-k). A360303