Properties of the Number 7779

Seven Thousand Seven Hundred Seventy-Nine

Basics

Value: 7778 → 7779 → 7780

Parity: odd

Prime: No

Previous Prime: 7759

Next Prime: 7789

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 2593

Divisors: 1, 3, 2593, 7779

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111001100011

Octal: 17143

Duodecimal: 4603

Hexadecimal: 1e63

Square: 60512841

Square Root: 88.19863944528849

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 1 horizontally, diagonally or antidiagonally adjacent to 1 neighboring 1. A297395

a(n) = smallest number that leads to a new cycle under the base-6 Kaprekar map of A165051. A165068

Numbers that are the sum of nine fourth powers in exactly six ways. A345848

Numbers k such that k² == 2 (mod 23²). A156849

Numbers whose smallest decimal digit is 7. A284068

Number of edges in an equilateral triangle when n internal equilateral triangles are drawn between the 3n points that divide each side into n+1 equal parts. A357008

Numbers k such that (k³ + 2, n³ + 4) is a twin prime pair. A178337

Inverse permutation to A190016: lexicographical ordering of integers 1 .. 10⁴. A190017

a(n) = (8·n+13·n³+3·n⁵)/24; also the sum of triangular numbers taken in successive groups of increasing size (see Example). A260513

Similar to A072921 but starting with 3. A152232