Properties of the Number 70643

Seventy Thousand Six Hundred Forty-Three

Basics

Value: 70642 → 70643 → 70644

Parity: odd

Prime: No

Previous Prime: 70639

Next Prime: 70657

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 41 × 1723

Divisors: 1, 41, 1723, 70643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10001001111110011

Octal: 211763

Duodecimal: 34A6B

Hexadecimal: 113f3

Square: 4990433449

Square Root: 265.7875091120725

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) = n³ + n² + n. A27444

Numbers of the form p·q, where p is prime and q=(p^k-1)/(p-1) is also prime for some integer k>1. A330832

Nonprime-powers k such that, for any prime p dividing k and m = 1+floor(log k/log p), rad(p^m (mod k)) divides k, where rad = A007947. A381750

a(n) = prime(n)³ + prime(n)² + prime(n). A181149

Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7. A252311

a(n) = -4·a(n-1) - 3·a(n-2) + a(n-3), a(0) = 1, a(1) = -2, a(2) = 4. A322504

a(n) = ∑_{k=0..floor(n²/(2·n+1))} binomial(n * (n-2·k),k). A373719

Numbers k in A024619 such that all residues r (mod k) in row k of A381801 are such that rad(r) divides k, where rad = A007947. A382438

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7. A252305

Numbers k that divide 3^(k-1/2) - 2^(k-1/2) - 1. A130061