Properties of the Number -869

Eight Hundred Sixty-Nine

Basics

Value: -870 → -869 → -868

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 79

Divisors: 1, 11, 79, 869

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101100101

Octal: -1545

Duodecimal: -605

Hexadecimal: -365

Square: 755161

Square Root: 29.478805945967352

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

Row sums of a number triangle related to the Pell numbers. A110331

Numerators in Taylor series expansion of (x/(exp(x) - 1))^3/2*exp(x/2). A222411

First differences of A000463. A188652

a(n) = ∑_i=1..n (-1)ⁱ⁺¹ prime(i)², where prime(k) denotes the k-th prime: alternating sum of the squares of the first n primes. A240860

Value k at the n-th step of A371282, where multiplied values are positive and subtracted values are negative. A371295

a(0) = 121; for n>0, a(n) = a(n-1) - n + 1. A137517

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 419", based on the 5-celled von Neumann neighborhood. A272048

Expansion of ∑_k>=1 μ(k)*log(1 + x^k/(1 - x^k)⁴)/k. A308291

Dirichlet g.f.: ζ(s) / (ζ(s-1) * ζ(s-2)). A351654

Diagonal sums of number a triangle related to the Pell numbers. A110332