Properties of the Number 239

Two Hundred Thirty-Nine

Basics

Value: 238 → 239 → 240

Parity: odd

Prime: Yes

Previous Prime: 233

Next Prime: 241

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 239

Divisors: 1, 239

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101111

Octal: 357

Duodecimal: 17B

Hexadecimal: ef

Square: 57121

Square Root: 15.459624833740307

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

The prime numbers. A40

Lesser of twin primes. A1359

Prime numbers at the beginning of the 20th century (today 1 is no longer regarded as a prime). A8578

Primes of the form x² + xy + 2y², with·and y nonnegative. A106856

Sophie Germain primes p: 2p+1 is also prime. A5384

Primes of the form 4·k + 3. A2145

Pell-Lucas numbers: numerators of continued fraction convergents to sqrt(2). A1333

Odd primes. A65091

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

Twin primes. A1097

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