Properties of the Number 19109

Nineteen Thousand One Hundred Nine

Basics

Value: 19108 → 19109 → 19110

Parity: odd

Prime: No

Previous Prime: 19087

Next Prime: 19121

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 97 × 197

Divisors: 1, 97, 197, 19109

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101010100101

Octal: 45245

Duodecimal: B085

Hexadecimal: 4aa5

Square: 365153881

Square Root: 138.23530663329106

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

Number of integer partitions of n with more than one mode. A362607

Semiprimes that are the sum of the first n semiprimes for some n. A92190

Odd composite integers m such that A052918(m-J(m,29)) == 0 (mod m) and gcd(m,29)=1, where J(m,29) is the Jacobi symbol. A340095

Sequence is {a(0,n)}, where a(m,0)=1, a(m,n) = a(m,n-1) + a(m-1,n), a(0,n+1) = a(n,n). A110576

Smallest solution m to (n+1)*φ(m) = n*σ(m), or -1 if no solution exists. A65824

Number of ways to fill a Young diagram with positive integers summing to n such that all rows and columns are strictly increasing. A323451

a(n) = 1 + n + ((n-1)*n²)/2. A218152

Numbers of the form p·q, p and q prime with q=2·p+3. A226754

Numbers whose base-2 representation has exactly 13 runs. A43580

a(n) = A065824(A047845(n+1)). A65884