Properties of the Number 19775

Nineteen Thousand Seven Hundred Seventy-Five

Basics

Value: 19774 → 19775 → 19776

Parity: odd

Prime: No

Previous Prime: 19763

Next Prime: 19777

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 ² × 7 × 113

Divisors: 1, 5, 7, 25, 35, 113, 175, 565, 791, 2825

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110100111111

Octal: 46477

Duodecimal: B53B

Hexadecimal: 4d3f

Square: 391050625

Square Root: 140.62361110425232

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 monosubstituted alkanes C(n-1)H(2n-1)-X with n-1 carbon atoms that are not stereoisomers. A621

a(n) = ∑_{i=1..n, j=1..n, gcd(i,j)=2} (n+1-i)*(n+1-j). A331761

Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having k adjacent blocks of size 3, i.e., blocks of the form (i,i+1,i+2) (0 <= k <= floor(n/3)). A184176

Numbers k such that k = prime(P) + π(P), where P is product of digits of k. A164324

Number of set partitions of {1,2,...,n} having no blocks of the form {i,i+1,i+2}. A184177

a(0) = 1, a(n) = 13·n² + 2 for n>0. A10004

Number of preferential arrangements of n labeled elements with repetitions allowed. A213048

Values of n such that L(18) and N(18) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227521

Decimal expansion of sqrt(e)/2. A19775