Properties of the Number 99987

Ninety-Nine Thousand Nine Hundred Eighty-Seven

Basics

Value: 99986 → 99987 → 99988

Parity: odd

Prime: No

Previous Prime: 99971

Next Prime: 99989

Digit Sum: 42

Digital Root: 6

Palindrome: No

Factorization: 3 × 33329

Divisors: 1, 3, 33329, 99987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011010010011

Octal: 303223

Duodecimal: 49A43

Hexadecimal: 18693

Square: 9997400169

Square Root: 316.2072105439723

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

Largest n-digit squarefree number whose internal as well as external digits form a squarefree number, or 0 if no such number exists. A77380

Number of pairs of consecutive prime (p,q) with q-p=6 and q < 10ⁿ. A93738

Number of steps in all Schroeder paths (i.e., consisting of steps U=(1,1), D=(1,-1),H=(2,0) and never going below the x-axis) from (0,0) to (2n,0). A89164

Numbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177). A193996

Largest n-digit lucky number. A261512

Bisection of A001113 (digits of e). A99987

Number of 4Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-2) and new values introduced in order 0..2. A275354