Number 4

Interestingness: 31 · Rank #7 of 1000

Visual representations

Binary image (n×n bits)
Element Be – Beryllium
Square · P4(2) = 4
2²
Prime factorization

Representations of 4

Greek numeral
δʹ
Sanskrit numeral
४
Arabic numeral
٤
Roman numeral
IV
Maya numeral
●●●●
Chinese numeral
四
Hebrew numeral
ד
Egyptian numeral
𓏹𓏹𓏹𓏹
Morse code
....-

4 in different numeral systems

Binary
100
Base-3
11
Base-4
10
Base-5
4
Base-6
4
Base-7
4
Base-8
4
Duodecimal
4
Hex
4
Vigesimal
4
Base-24
4
Base-36
4
Negabinary
100

Factorization

Prime factors: 2
Divisors: 1, 2, 4
Sum of divisors other than 4: 3
Product of prime factors: 4 = 2 × 2

Number-theory characteristics (10)

Square Perfect Power Difference of 2 squares Odious number Lucas number Powerful number Even Ones-Zeroes Composite Deficient

Base-10 digit properties (8)

These depend on the decimal representation of the number.

Palindromic Harshad Smith Repdigit Spy number Narcissistic Trimorphic Zuckerman number

Related primes

Number 4 prime
Prime number before 4
Prime number after 4