Properties of the Number -69

Sixty-Nine

Basics

Value: -70 → -69 → -68

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 23

Divisors: 1, 3, 23, 69

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000101

Octal: -105

Duodecimal: -59

Hexadecimal: -45

Square: 4761

Square Root: 8.306623862918075

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) = A003961(n) - 2·n. A252748

a(n) is the sum of the elements on the antidiagonal of the difference table of the divisors of n. A161700

Numbers k in pairs (j,k), with j <> k +- 1, such that the sum of their cubes is equal to a centered cube number. A352136

Expansion of ∏_{k >= 1} (1 - x^k)⁶. A729

Expansion of f(-x) / f(-x³) in powers of·where f() is a Ramanujan θ function. A137569

Pascal-(1,-3,1) array, read by antidiagonals. A123562

a(n) = 2ⁿ * ∑_k=0..n k^p*q^k, where p=2, q=-1/2. A232603

Coefficients of the '6th-order' mock θ function 2 μ(q). A53273

Replace 4^k with (-4)^k in base 4 expansion of n. A73791

Sequence is {a(0,n)}, where a(m,0)=0, a(m,n) = a(m-1,n)+a(m,n-1) and a(0,n) is such that a(n,n) = n for all n. A110665