723
The 723 is a voltage regulator building block.
- Odd
- Composite
Where 723 fits
Why 723 is special
It predates the fixed three-terminal regulators and gives access to the internal reference and error amplifier, so bench power supplies were built around it for years.
Factors & digit properties
- Divisors (4)
- 1, 3, 241, 723
- Prime factorisation
- 3 × 241
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 723
- Binary
- 1011010011
- Octal
- 1323
- Hexadecimal
- 2d3
- Roman numeral
- DCCXXIII
- Scientific notation
- 7.230 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
The 723 gave access to its internal reference and error amplifier, which the fixed three-terminal regulators that followed hid away.
View 7805 →Other connections
- developed from7805
why?
Strength 0.50, confidence "high".
Technology & computing
The 723 provides a reference, error amplifier and series pass transistor as separate accessible elements, allowing adjustable and current-limited supplies at the cost of external component count.
DocumentedTechnology & computingPeriod: 1967–
Common questions
Is 723 a prime number?
No, 723 is not prime.
What are the factors of 723?
The factors of 723 are 1, 3, 241, 723.
What is 723 in Roman numerals?
723 in Roman numerals is DCCXXIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026