Properties of the Number 19973

Nineteen Thousand Nine Hundred Seventy-Three

Basics

Value: 19972 → 19973 → 19974

Parity: odd

Prime: Yes

Previous Prime: 19963

Next Prime: 19979

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 19973

Divisors: 1, 19973

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111000000101

Octal: 47005

Duodecimal: B685

Hexadecimal: 4e05

Square: 398920729

Square Root: 141.32586458253138

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

Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 21. A51962

Primes remaining prime if any digit is deleted (zeros allowed). A51362

Zeroless primes that remain prime if any digit is deleted. A34302

Primes p such that p's set of distinct digits is {1,3,7,9}. A108386

Expansion of g²/(1 + x²*g), where g = 1+x·g³ is the g.f. of A001764. A391295

Primes with all odd digits such that the next three primes also contain all odd digits. A68831

Primes with all odd digits such that the next four primes also contain all odd digits. A68832

a(n) = ((2+sqrt(5))*(4+sqrt(5))ⁿ + (2-sqrt(5))*(4-sqrt(5))ⁿ)/2. A162772

Fibonacci sequence beginning 2, 19. A22119

Denominators of continued fraction convergents to sqrt(816). A42575