Properties of the Number 61998

Sixty-One Thousand Nine Hundred Ninety-Eight

Basics

Value: 61997 → 61998 → 61999

Parity: even

Prime: No

Previous Prime: 61991

Next Prime: 62003

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 10333

Divisors: 1, 2, 3, 6, 10333, 20666, 30999, 61998

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111001000101110

Octal: 171056

Duodecimal: 2BA66

Hexadecimal: f22e

Square: 3843752004

Square Root: 248.99397583074173

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

Expansion of ∏_k>=1 (1 + x^k)/(1 - 2·x^k). A264685

Number of ways to place 5 nonattacking kings on an n X n board. A61998

Triangle, read by rows, T(n, k) = (2·n)!/((n-k)! * k!)² - (2·n)!/(n!)² + 1. A176078

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7. A252098