Properties of the Number 61961

Sixty-One Thousand Nine Hundred Sixty-One

Basics

Value: 61960 → 61961 → 61962

Parity: odd

Prime: Yes

Previous Prime: 61949

Next Prime: 61967

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 61961

Divisors: 1, 61961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111001000001001

Octal: 171011

Duodecimal: 2BA35

Hexadecimal: f209

Square: 3839165521

Square Root: 248.9196657558418

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

Primes having only {1, 6, 9} as digits. A363023

Numbers k such that in the ring Z[sqrt(3)] the norm of (-1+sqrt(3))^k-1 is prime. A67834

Primes of the form 8n² + 9. A201705

Number of planar n X n X n binary triangular grids symmetric under 120-degree rotation with no more than 1 one in any 3 X 3 X 3 subtriangle. A153899

Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 8 (most significant digit on right). A61961