Properties of the Number 29991

Twenty-Nine Thousand Nine Hundred Ninety-One

Basics

Value: 29990 → 29991 → 29992

Parity: odd

Prime: No

Previous Prime: 29989

Next Prime: 30011

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 13 × 769

Divisors: 1, 3, 13, 39, 769, 2307, 9997, 29991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111010100100111

Octal: 72447

Duodecimal: 15433

Hexadecimal: 7527

Square: 899460081

Square Root: 173.1790980459247

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

Numbers k such that R(k+9) = 3. A86947

a(n) = A019565(1+n) - A019565(A001065(n)), where A019565 is the base-2 exp-function, and A001065 is the sum of proper divisors of n. A379496

Numbers n such that reversal(n) = (2/3)*n - 2. A101703

Shifts 9 places left under Euler transform with a(0)=0 and a(n)=1 for n<9. A218026

The number of n-digit numbers in A270048. A270270

Let f(x) = 1 -x³+ ∑_j>=2 (x^{2^j}-x^{1+2^j}). Then a(n) is n times the coefficient of xⁿ in the expansion of log(f(x)). A271726

Numbers n with the property that k·n and (k+1)*n have a common nonzero digit for all k. A308466

Squares which are palindromes in base 6. A29991

π(3): fundamental real period of the Dixonian elliptic functions sm(z) and cm(z). A197374