Properties of the Number -7447

Four Hundred Forty-Seven

Basics

Value: -7448 → -7447 → -7446

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: Yes

Factorization: 11 × 677

Divisors: 1, 11, 677, 7447

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110100010111

Octal: -16427

Duodecimal: -4387

Hexadecimal: -1d17

Square: 55457809

Square Root: 86.29600222490032

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

Numbers that are palindromic in bases 2 and 10. A7632

Numbers k such that x^k + x + 1 is irreducible over GF(2). A2475

Palindromes with exactly 2 prime factors (counted with multiplicity). A46328

Add/multiply sequence, see example. A93361

Square array A(n,k) = A276156((2^n-1) * (2k-1)) / A002110(n-1), read by descending antidiagonals. A328464

Discriminants of imaginary quadratic fields with class number 42 (negated). A351680

Numbers such that RevBinary() = RevDecimal(), where RevDecimal(n) is the decimal reversal of n (A004086) and RevBinary(n) is the binary reversal of n (A030101). A81434

Palindromic Smith numbers. A98834

a(1) = 0, a(2) = -2; for n > 2, a(n) + a(n-2) - a(n-3) - a(n-5) - ... - a(n-p) = (-1)ⁿ⁺¹*n if n is prime, otherwise = 0, where p = largest prime < n. A2120

a(n) is the decimal expansion of 7nn7. A100897