Properties of the Number 18973

Eighteen Thousand Nine Hundred Seventy-Three

Basics

Value: 18972 → 18973 → 18974

Parity: odd

Prime: Yes

Previous Prime: 18959

Next Prime: 18979

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 18973

Divisors: 1, 18973

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100101000011101

Octal: 45035

Duodecimal: AB91

Hexadecimal: 4a1d

Square: 359974729

Square Root: 137.7425134081704

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

Mother primes of order 8. A136067

Smallest of three consecutive primes whose sum is a triangular number. A226148

Expansion of (1-x+x²)/((x²+x+1)*(x²+5·x+1)). A110310

Primitive prime factors of the cyclotomic polynomial sequence φ(9,k) in the order in which they occur. A256144

Triangle read by rows: T(n,k) is the number of rooted ordered trees with node weights summing to n, where the root has weight 0, all internal nodes have weight 1, and leaf nodes have weights in {1,...,k}. A384685

List of prime factors of 10^{10^(10¹⁰⁰}) - 10. A227246

Primes congruent to 2 mod 61. A142800

Primes of the form 20·k² + 32·k + 13. A154414

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 72 ones. A31840

Primes congruent to 34 mod 59. A142761