Properties of the Number 61978

Sixty-One Thousand Nine Hundred Seventy-Eight

Basics

Value: 61977 → 61978 → 61979

Parity: even

Prime: No

Previous Prime: 61967

Next Prime: 61979

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 19 × 233

Divisors: 1, 2, 7, 14, 19, 38, 133, 233, 266, 466

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111001000011010

Octal: 171032

Duodecimal: 2BA4A

Hexadecimal: f21a

Square: 3841272484

Square Root: 248.95381097705655

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

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order. A205475

A simple grammar: pairs of cycles of cycles. A52822

Number of (n+1)X3 0..2 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order. A205469

Number of (n+1)X6 0..2 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order. A205472

Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 25 (most significant digit on right). A61978

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. A305681