Properties of the Number 9959

Nine Thousand Nine Hundred Fifty-Nine

Basics

Value: 9958 → 9959 → 9960

Parity: odd

Prime: No

Previous Prime: 9949

Next Prime: 9967

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 23 × 433

Divisors: 1, 23, 433, 9959

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011100111

Octal: 23347

Duodecimal: 591B

Hexadecimal: 26e7

Square: 99181681

Square Root: 99.79478944313676

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) = F(n+1) + L(n), where F(n) and L(n) are Fibonacci and Lucas numbers, respectively. A13655

a(n) = a(n-1) + a(n-2) with a(0)=2, a(1)=5. Sometimes called the Evangelist Sequence. A1060

Sum of digits = 8 times number of digits. A61425

Number of integer partitions of n such that for some part k the multiplicity of k exceeds k. A387578

Numbers in which 9 outnumbers all other digits together. A292739

a(n) = pq + pr + qr with p = prime(n), q = prime(n+1), and r = prime(n+2). A127345

Numbers k such that 4·3^k - 1 is prime. A5540

Number of times the digit 0 appears in the first 10ⁿ decimal digits of sqrt(2), sometimes called Pythagoras's constant, counting after the decimal point. A322641

Composites in A127345. A127347

Numbers n such that n!8 + 2 is prime. A204663