Properties of the Number 170

One Hundred Seventy

Basics

Value: 169 → 170 → 171

Parity: even

Prime: No

Previous Prime: 167

Next Prime: 173

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 17

Divisors: 1, 2, 5, 10, 17, 34, 85, 170

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010

Octal: 252

Duodecimal: 122

Hexadecimal: aa

Square: 28900

Square Root: 13.038404810405298

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

Numbers k such that (11·10^k + 19)/3 is prime. A270339

a(n) = n² + 1. A2522

a(n) = sigma₂(n): sum of squares of divisors of n. A1157

List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's. A14486

Numbers that are the product of exactly three (not necessarily distinct) primes. A14612

a(2n) = 2·a(2n-1), a(2n+1) = 2·a(2n)+1 (also a(n) is the n-th number without consecutive equal binary digits). A975

a(n) = ∑_k=1..n floor(n/k); also ∑_k=1..n d(k), where d = number of divisors (A000005); also number of solutions to x·y = z with 1 <= x,y,z <= n. A6218

a(n) = n*(n+3)/2. A96

Fibbinary numbers: if n = F(i1) + F(i2) + ... + F(ik) is the Zeckendorf representation of n (i.e., write n in Fibonacci number system) then a(n) = 2^{i1 - 2} + 2^{i2 - 2} + ... + 2^{ik - 2}. Also numbers whose binary representation contains no two adjacent 1's. A3714

Numbers that are the sum of 2 nonzero squares. A404

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