Properties of the Number -1917

Nine Hundred Seventeen

Basics

Value: -1918 → -1917 → -1916

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 71

Divisors: 1, 3, 9, 27, 71, 213, 639, 1917

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101111101

Octal: -3575

Duodecimal: -1139

Hexadecimal: -77d

Square: 3674889

Square Root: 43.78355855797927

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 (1 + x) / (5·x² - 2·x + 1). A116483

Numerator of Hermite(n, 9/14). A159510

Values of n such that L(5) and N(5) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226925

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 123", based on the 5-celled von Neumann neighborhood. A270213

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 315", based on the 5-celled von Neumann neighborhood. A271249

Number of partitions of n into pairwise relatively prime parts. A51424

The "comma sequence": the lexicographically earliest sequence of positive numbers with the property that the sequence formed by the pairs of digits adjacent to the commas between the terms is the same as the sequence of successive differences between the terms. A121805

Number of subsets of {1..n} such that some element can be written as a nonnegative linear combination of the others. A364914

Number of integer partitions of n such that it is not possible to choose a different prime factor of each part. A370593

Sum of first n nonprimes. A51349