Properties of the Number -19001

Nineteen Thousand One

Basics

Value: -19002 → -19001 → -19000

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 19001

Divisors: 1, 19001

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -100101000111001

Octal: -45071

Duodecimal: -ABB5

Hexadecimal: -4a39

Square: 361038001

Square Root: 137.84411485442533

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

Expansion of e.g.f. exp(3 * (1 - exp(x)) + x). A320432

Primes having only {0, 1, 9} as digits. A199329

Bemirps: primes that yield a different prime when turned upside down with reversals of both being two more different primes. A48895

Consider a number of k digits n = d_k*10^k-1 + d_k-1*10^k-2 + … + d₂*10 + d₁. Sequence lists the numbers n such that σ(n) - n = ∑_i=1..k-1{σ(∑_j=1..i{d_j*10^j-1}) - ∑_j=1..i{d_j*10^j-1}} (see example below). A240894

Primes p for which the period of reciprocal = (p-1)/8. A56213

Least prime in A031926 (lesser of 8-twins) whose distance to the next 8-twin is 6·n. A52353

A239461(n) / n². A239464

a(n) is the n-th prime whose decimal expansion begins with the decimal expansion of n. A77345

Hyperartiads. A270798

Primes congruent to 3 mod 59. A142730