Properties of the Number 670

Six Hundred Seventy

Basics

Value: 669 → 670 → 671

Parity: even

Prime: No

Previous Prime: 661

Next Prime: 673

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 67

Divisors: 1, 2, 5, 10, 67, 134, 335, 670

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1010011110

Octal: 1236

Duodecimal: 47A

Hexadecimal: 29e

Square: 448900

Square Root: 25.88435821108957

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

Octahedral numbers: a(n) = n*(2·n² + 1)/3. A5900

Table T(n,k) read by downward antidiagonals: number of Lyndon words (aperiodic necklaces) with n beads of k colors, n >= 1, k >= 1. A74650

Expansion of ∏_m>=1 (1+x^m)^A000009(m). A50342

Number of partitions of n in which the least part is odd. A26804

Sum of composite numbers between successive primes. A54265

Expansion of (1+x²)/((1-x)²*(1-x²)²). A5993

Numbers m such that the Bernoulli number B_m has denominator 66. A51230

a(n) = n*(3·n + 7)/2. A140090

Numbers k such that 2^k + 9 is prime. A57196

Numbers k such that the k-th composition in standard order (row k of A066099) has alternating sum -2. A345924