Properties of the Number -939

Nine Hundred Thirty-Nine

Basics

Value: -940 → -939 → -938

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: Yes

Factorization: 3 × 313

Divisors: 1, 3, 313, 939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110101011

Octal: -1653

Duodecimal: -663

Hexadecimal: -3ab

Square: 881721

Square Root: 30.643106892089126

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

Expansion of ∑_k>=1 μ(k)*log((theta₃(x^k) + 1)/2)/k, where theta₃() is the Jacobi θ function. A308297

Second column of number triangle A110245. A110246

Numbers k such that 8·10^k - 49 is prime. A271269

Number of ordered rooted trees with n non-root nodes and all outdegrees <= three. A36765

Palindromic in bases 4 and 10. A29961

V-toothpick (or honeycomb) sequence (see Comments lines for definition). A161206

Numbers k such that φ(k) = φ(σ(k)). A6872

a(n) = -1 + ∑_i=1..n φ(i). A15614

Lunar primes (formerly called dismal primes) (cf. A087062). A87097

Numbers all of whose divisors are palindromic. A62687