Properties of the Number 19001

Nineteen Thousand One

Basics

Value: 19000 → 19001 → 19002

Parity: odd

Prime: Yes

Previous Prime: 18979

Next Prime: 19009

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

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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

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

Anagrasum integers: integers N that exactly reproduce their set of digits when we form the set of sums of pairs of adjacent digits. A296521