Recognised as Number
-679
- Negative
- Odd
- 3 digits
-679 is an odd 3-digit integer and the negative of 679. It has 4 divisors and a digital root of 4.
Number properties
ParityOddnot divisible by 2
SignNegative
Absolute value679
Digit count3
Digit sum22
Digit product378
Multiplicative persistence5times the digit product can be taken before one digit is left
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 7 × 97
Distinct prime factors27, 97
Number of divisors4
Sum of divisors σ(n)784
SquarefreeYesno repeated prime factor
All divisors1, 7, 97, 6794 in total
Arithmetic
Representations
Decimal-679
Binary101010011110 bits
Octal1247
Hexadecimal2A7
Base 36IV
In wordsminus six hundred and seventy-nine
Ordinalminus six hundred and seventy-ninth
Scientific notation-6.79 × 10^2
Engineering notation-679
In other bases
Ternary221011base 3; the most digit-efficient integer base after e: 6 digits
Quinary10204base 5; one hand: 5 digits
Septenary1660base 7: 4 digits
Nonary834base 9; each digit is two ternary digits: 3 digits
Duodecimal487base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal1djbase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal11:19base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternaryT01T0TTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1010101001base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
1111110101011001
Bit length10 bitsto write the magnitude
Set bits6the population count, or Hamming weight
Zero bits4within that length
Bit parityeven6 set bits, so even; not the same as the number itself being odd
Highest set bitbit 9worth 512
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes202 a7
Gray code1111110100n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit1111110101011001two's complement
32-bit11111111111111111111110101011001two's complement
64-bit1111111111111111111111111111111111111111111111111111110101011001two's complement
One's complement0000001010100110at 16 bits, every bit flipped
Bits reversed1001101010111111at 16 bits
Rotated left by 11111101010110011at 16 bits, wrapping
Shifted left by 1-10101001110= -1,358, no wrap
Shifted right by 1-101010100= -339, discarding the low bit
These bits as a double3.35470574 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Powers & multiples
-679 to the power 2461,041
-679 to the power 3-313,046,839
-679 to the power 4212,558,803,681
-679 to the power 5-144,327,427,699,399
First ten multiples-679, -1,358, -2,037, -2,716, -3,395, -4,074, -4,753, -5,432, -6,111, -6,790
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7Yes
Divisible by 8No, remainder 7
Divisible by 9No, remainder 4
Divisible by 10No, remainder 9
Divisible by 11No, remainder 8
Divisible by 12No, remainder 7
Divisible by 100No, remainder 79
As a percentage & fraction
As a percentage-67,900%
-679% as a decimal-6.79
-679% of 100-679
-679% of 1,000-6,790
As a fraction of 100-679/100
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