Properties of the Number 69999

Sixty-Nine Thousand Nine Hundred Ninety-Nine

Basics

Value: 69998 → 69999 → 70000

Parity: odd

Prime: No

Previous Prime: 69997

Next Prime: 70001

Digit Sum: 42

Digital Root: 6

Palindrome: No

Factorization: 3 × 23333

Divisors: 1, 3, 23333, 69999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001000101101111

Octal: 210557

Duodecimal: 34613

Hexadecimal: 1116f

Square: 4899860001

Square Root: 264.5732412773446

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

Lexicographically earliest sequence of distinct positive terms such that a(n) is a substring of a(n)*a(n+1). A332703

Triangle T(n,k) = 10^n-1 -1 + k·floor(9·10^n-1/(n+1)), with 1 <= r <= n, read by rows. A93850

Lexicographically earliest injective sequence such that a(n) = A007953(a(a(n))), where A007953 = sum of digits (in base 10). A167152

a(n) is the smallest composite number with the sum of digits = the n-th composite number. A73866

Smallest number whose sum of digits is 2n. A133296

The smallest composite number larger than the n-th composite number, which has a sum of digits equal to the n-th composite number. A161551

a(n) = 7·10ⁿ - 1. A198699

Least semiprime whose digital sum is n, or 0 if no such integer exists. A213653

Numbers m having with m+1 no common digit in decimal representations. A226637