Properties of the Number -1439

Four Hundred Thirty-Nine

Basics

Value: -1440 → -1439 → -1438

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 1439

Divisors: 1, 1439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10110011111

Octal: -2637

Duodecimal: -9BB

Hexadecimal: -59f

Square: 2070721

Square Root: 37.93415347678132

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

a(n) = -n² + 9·n + 23. A126719

E.g.f. satisfies A(x) = exp(x - x⁴ * A(x)). A362431

The c coefficients of the transform a·x² + (4·a/k - b)*x + 4·a/k² + 2·b/k + c = 0 for a,b,c = 1,-1,-1, k = 1,2,3... A229526

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 387", based on the 5-celled von Neumann neighborhood. A271546

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

Safe primes p: (p-1)/2 is also prime. A5385

Number of partitions of n in which no parts are multiples of 3. A726

Primes with 7 as smallest primitive root. A1126

Primes p such that q = (p² + 1)/2 is also a prime. A48161

Primes that become another prime under the map 1 <-> 0 (acting on the digits: A222210), cf. A171013. A175791