Properties of the Number 7999

Seven Thousand Nine Hundred Ninety-Nine

Basics

Value: 7998 → 7999 → 8000

Parity: odd

Prime: No

Previous Prime: 7993

Next Prime: 8009

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 19 × 421

Divisors: 1, 19, 421, 7999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100111111

Octal: 17477

Duodecimal: 4767

Hexadecimal: 1f3f

Square: 63984001

Square Root: 89.4371287553441

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

Smallest number whose sum of digits is n. A51885

Number of compositions of n with some part repeated. A261982

a(n) = n³ - 1. A68601

a(n) = n*(7·n² - 1)/6. A4126

Numbers in which 9 outnumbers all other digits together. A292739

Number of nonempty subsets of {1, 2, ..., n} having pairwise coprime elements. A187106

a(n) = n*(11·n + 3)/2. A254963

Sums of distinct powers of 6. A33043

Engel expansion whose sum has the concatenation of its terms as decimal part. Case a(1) = 3. A305667

Numbers with rounded up arithmetic mean of digits = 9. A178369