Properties of the Number -747

Seven Hundred Forty-Seven

Basics

Value: -748 → -747 → -746

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: Yes

Factorization: 3 ² × 83

Divisors: 1, 3, 9, 83, 249, 747

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1011101011

Octal: -1353

Duodecimal: -523

Hexadecimal: -2eb

Square: 558009

Square Root: 27.331300737432898

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 r(q³) / r(q)³ in powers of q where r() is the Rogers-Ramanujan continued fraction. A285583

a(n) = 1 + ∑_k=2..n (-1)^k * k·a(floor(n/k)). A361982

Expansion of e.g.f. exp(3·sin(x)). A352640

Shifts left under Euler transform. A38072

Denominator coefficients of infinite over the Fibonacci sequence: p(x,n)=(1 - x)*Sum[Fibonacci[k]ⁿ*x^k, {k, 0, Infinity}]; t(n,m)=Coefficients(Denominator(p(x,n)). A156133

Values of n such that L(3) and N(3) 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. A226923

a(n) = ∑_{d divides n} q(d), where q(d) = A000009 = number of partitions of d into distinct parts. A47966

Numbers obtained by reinterpreting base-2 representation of n in the factorial base: a(n) = ∑_k>=0 A030308(n,k)*A000142(k+1). A59590

Array A(n,k) = n·A(n,k-1) + A(n,k-2) read by upward antidiagonals, starting A(n,0) = 0, A(n,1) = 1. A172236

Number of distinct products ij with 1 <= i, j <= n (number of distinct terms in n X n multiplication table). A27424