Properties of the Number -129889

One Hundred Twenty-Nine Thousand Eight Hundred Eighty-Nine

Basics

Value: -129890 → -129889 → -129888

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 37

Digital Root: 1

Palindrome: No

Factorization: 193 × 673

Divisors: 1, 193, 673, 129889

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11111101101100001

Octal: -375541

Duodecimal: -63201

Hexadecimal: -1fb61

Square: 16871152321

Square Root: 360.40116536992497

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

Fermat pseudoprimes to base 2 with two prime factors. A214305

Numbers k such that 2^k-1 == 1 (mod k) and p-1 does not divide k-1 for every prime p dividing k. A316907

Composite integers k such that 2^d == 2^k/d (mod k) for all d∣k. A291601

Pseudotwinprimes p+2 for primes p such that p+2 divides p^p+2+2 and p+2 is composite. A100873

Numbers k such that 2^k-1 == 1 (mod k) and lpf(k)-1 does not divide k-1. A316906

a(n) is the smallest n-gonal number that is a Fermat pseudoprime to base 2 (A001567), or -1 if no such number exists. A371759

Strong pseudoprimes to base 21. A20247

Brilliant Sarrus numbers. A86837

9-gonal numbers that are semiprimes. A356424