Properties of the Number 39994

Thirty-Nine Thousand Nine Hundred Ninety-Four

Basics

Value: 39993 → 39994 → 39995

Parity: even

Prime: No

Previous Prime: 39989

Next Prime: 40009

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 2 × 19997

Divisors: 1, 2, 19997, 39994

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110000111010

Octal: 116072

Duodecimal: 1B18A

Hexadecimal: 9c3a

Square: 1599520036

Square Root: 199.98499943745782

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

a(n) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 2, and a(3) = 3. A50051

Integers k that have the property that there exists an integer·with n+1 digits, such that 1 <= k/x < 2 and k/x = 1 + (x-10ⁿ)/(10ⁿ-1), i.e., the same digits appear in the denominator and in the recurring decimal. A288782

Numbers n such that σ(n) = 6*(reversal(n)-n). A135243

Convolution of number of overpartitions and Catalan numbers. A292619

Column 1 of triangle A152391. A152393

Number of primes embedded in decimal expansion of prime(n) as substrings. A39994

Number of integers, x, with n+1 digits, that have the property that there exists an integer k, with x <= k < 2·x, such that k/x = 1 + (x-10ⁿ)/(10ⁿ-1), i.e., the same digits appear in the denominator and in the recurring decimal. A285273