Number

69

69 — Sixty-Nine

69 is a composite number, odd, a calendar year.

Sixty-nine is a semiprime (3 × 23) and is widely known for its juvenile humor association. It is the only number whose square (4761) and cube (328509) together use every digit 0–9 exactly once.

Sources https://en.wikipedia.org/wiki/69_(number)

Curated Deficient Number Squarefree Strobogrammatic

Properties

Parity: Odd
Digit count: 2
Digit sum: 15
Digital root: 6
Palindrome: No
Divisor count: 4
σ(n) — sum of divisors: 96

Primality

Prime factorization: 3 × 23

Divisors & multiples

All divisors (4)

1 · 3 · 23 · 69

Aliquot sum (sum of proper divisors): 27

Factor pairs (a × b = 69)

1 × 69

3 × 23

First multiples

69 · 138 · 207 · 276 · 345 · 414 · 483 · 552 · 621 · 690

Representations

In words: sixty-nine
Ordinal: 69th
Roman numeral: LXIX
Binary: 1000101
Octal: 105
Hexadecimal: 45

Also seen as

ASCII character

As an ASCII codepoint, 69 is E. Printable ASCII character E.

Network port

TCP/UDP port 69 is the well-known port for TFTP — Trivial File Transfer Protocol.

Hex color

#000045

RGB(0, 0, 69)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.69.