Properties of the Number -1549

Five Hundred Forty-Nine

Basics

Value: -1550 → -1549 → -1548

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 1549

Divisors: 1, 1549

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11000001101

Octal: -3015

Duodecimal: -A91

Hexadecimal: -60d

Square: 2399401

Square Root: 39.35733730830886

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

Triangle read by rows. T(n, k) = kⁿ * BellPolynomial(n, -1/k) for k > 0, if k = 0 then T(n, k) = kⁿ. A350261

Triangle read by rows. T(n, k) = B(n, n - k + 1) where B(n, k) = kⁿ * BellPolynomial(n, -1/k) for k > 0, if k = 0 then B(n, k) = kⁿ. A350262

List of quadruples (r,s,t,u): the matrix M = [[4,12,9][2,5,3][1,2,1]] is raised to successive negative powers, then (r,s,t,u) are the square roots of M[1,3], M[1,1], M[3,3], M[3,1] respectively. A249580

L.g.f.: log(∏_k>=1 1/(1 - x^k/(1 + x))) = ∑_k>=1 a(k)*x^k/k. A307675

The negative number of minimum absolute value not obtainable from 1 in n steps using addition, multiplication, and subtraction. A229686

Primes p such that the decimal expansion of its base-9 conversion is also prime. A65727

Number of partitions of n such that no part is a sum of two or more other parts. A237667

Odd numbers not of form p + 2^k (de Polignac numbers). A6285

Primes of the form x² + 45y². A107152

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