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Properties of the Number 7869

Seven Thousand Eight Hundred Sixty-Nine

Basics

Value: 7868 → 7869 → 7870

Parity: odd

Prime: No

Previous Prime: 7867

Next Prime: 7873

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 43 × 61

Divisors: 1, 3, 43, 61, 129, 183, 2623, 7869

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111010111101

Octal: 17275

Duodecimal: 4679

Hexadecimal: 1ebd

Square: 61921161

Square Root: 88.70738413458037

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

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. A301884
a(1) = 10; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A111524
Number of integer partitions of n that contain at least one even part and whose halved even parts are relatively prime. A366845
Triangle interpolating the swinging factorial (A056040) restricted to odd indices with its binomial inverse. Triangle read by rows. For n >= 0, k >= 0. A163772
Inverse binomial transform of the β numbers 1/β(n+1,n+1) (A002457). A163872
Numbers n such that φ(n) = φ(n+12) and n is not divisible by 2. A217141
Pseudoprimes to base 11. A20139
Length of n-th iterate of the mapping 00->0010, 01->001, 10->011, starting with 00. A289010
Numbers k such that A003961(k) = 2k +- 7, multiplied by the sign of difference A003961(k)-2k, where A003961 is fully multiplicative with a(prime(i)) = prime(i+1). A379237
Triangle read by rows: T(n,k) = round(c(n)/(c(k)*c(n-k))) where c are partial products of a sequence defined in comments. A172359