Properties of the Number 675

Six Hundred Seventy-Five

Basics

Value: 674 → 675 → 676

Parity: odd

Prime: No

Previous Prime: 673

Next Prime: 677

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 ²

Divisors: 1, 3, 5, 9, 15, 25, 27, 45, 75, 135

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010100011

Octal: 1243

Duodecimal: 483

Hexadecimal: 2a3

Square: 455625

Square Root: 25.98076211353316

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Powerful numbers, definition (1): if a prime p divides n then p² must also divide n (also called squareful, square full, square-full or 2-powerful numbers). A1694

a(n) = n*(n+2) = (n+1)² - 1. A5563

Powerful numbers (A001694) that are not prime powers (A000961). A286708

Numbers k that divide the (right) concatenation of all numbers <= k written in base 25 (most significant digit on left). A29470

a(n) = 3·n². A33428

Numbers that are products of 5 primes (or 5-almost primes, a generalization of semiprimes). A14614

a(n) = period of the sequence {b(m), m>=0}, defined by b(m):=binomial(m+n,n) mod n. A133900

a(n) = floor(n²/3). A212

Numerator of 1/4 - 1/n². A61037

Achilles numbers - powerful but imperfect: if n = Product(p_i^e_i) then all e_i > 1 (i.e., powerful), but the highest common factor of the e_i is 1, i.e., not a perfect power. A52486