Properties of the Number 16638

Sixteen Thousand Six Hundred Thirty-Eight

Basics

Value: 16637 → 16638 → 16639

Parity: even

Prime: No

Previous Prime: 16633

Next Prime: 16649

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 47 × 59

Divisors: 1, 2, 3, 6, 47, 59, 94, 118, 141, 177

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000011111110

Octal: 40376

Duodecimal: 9766

Hexadecimal: 40fe

Square: 276823044

Square Root: 128.98837156891315

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(n) = prime(n)*prime(n-1) + 1. A23523

Starts of runs of 3 consecutive integers that are all terms in A381581. A381583

Numbers n such that string reversal of n is a substring of n-th prime. A109304

a(n) = 9·n² - 3. A157872

a(n) is the smallest number which can be represented as the sum of n distinct nonzero squares in exactly 2 ways, or -1 if no such number exists. A374287

Numbers k such that the concatenation of k with the k-th prime gives a palindrome. A115997

a(1)=1. a(n) = ∑_{1<=k<n, gcd(k,n(n+1))=1} a(k). A125596

Number of (n+1) X (7+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction. A250741

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction. A250742

Decimal expansion of log(15). A16638