Properties of the Number 61009

Sixty-One Thousand Nine

Basics

Value: 61008 → 61009 → 61010

Parity: odd

Prime: No

Previous Prime: 61007

Next Prime: 61027

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 ² × 19 ²

Divisors: 1, 13, 19, 169, 247, 361, 3211, 4693, 61009

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111001010001

Octal: 167121

Duodecimal: 2B381

Hexadecimal: ee51

Square: 3722098081

Square Root: 247

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) = (11·n + 5)². A17450

Squares with initial digit '6'. A45789

Squares that become prime when their most significant (or leftmost) digit is removed. A225873

Discriminants of cyclic cubic fields. A343000

Numbers whose base-3 representation is a square when read in base 10. A267763

Discriminants with exactly 2 associated cyclic cubic fields. A343002

Discriminants with at least 2 associated cyclic cubic fields. A343024

Number of subsets of {1,2,...,n-8} without differences equal to 4 or 8. A224815

Squares when digits rotated right once remain square. A35126

Numbers k such that τ(k) - τ(k+1) = 1. A68208