Properties of the Number 19308

Nineteen Thousand Three Hundred Eight

Basics

Value: 19307 → 19308 → 19309

Parity: even

Prime: No

Previous Prime: 19301

Next Prime: 19309

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 1609

Divisors: 1, 2, 3, 4, 6, 12, 1609, 3218, 4827, 6436

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101101101100

Octal: 45554

Duodecimal: B210

Hexadecimal: 4b6c

Square: 372798864

Square Root: 138.953229541454

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

a(0) = 1, a(1) = 4, and a(n) = a(n-1) + a(n-2) for n >= 2. A285

Number of compositions (p0, p1, p2, ...) of n with π - p0 <= i and π >= p0. A177510

Irregular triangle read by rows where T(n,k) is the number of integer compositions of n with k weak excedances (parts on or above the diagonal), all zeros removed. A352525

Fibonacci sequence with initial values a(0) = 3 and a(1) = 1. A104449

Numbers n such that n is a substring of its square in base 3 (written in base 10). A18827

Values of·in the solutions to x² - 3xy + y² + 11 = 0, where 0 < x < y. A237132

Number of 6k+1 primes (A002476) in range ]2ⁿ,2ⁿ⁺¹]. A95015

a(n) = prime(n)*prime(n+1)*prime(n+2) - prime(n+3)². A135734

Expansion of ∏_k>=1 ((1 + x^4·k) / (1 - x^k)). A285472

5-digit terms in the continued fraction for π. A48960