Number 399 - properties and curiosities

399 (number)

399

Number 399 properties

  • Harshad
  • 399 is an odd number.
  • 399 is a Harshad number, which means it is divisible by the sum of its digits (399 = 21, and 399 is divisible by 21).

Prime factorization

Prime factorization of 399: 3 × 7 × 19.

Divisors

Divisor count: 8

1, 3, 7, 19, 21, 57, 133, 399

Factors of 399 are: 1, 3, 7, 19, 21, 57, 133, 399.

Representations

In octal, 399 is represented as 617.

In binary, 399 is represented as 110001111.

In hex, 399 is represented as 18F.

Roman numeral: CCCXCIX

Curiosities

  • 399 is divisible by the sum of its digits.

Quick answers

Is 399 prime?
No, 399 is not prime.

What are the factors of 399?
1, 3, 7, 19, 21, 57, 133, 399

What is 399 in binary?
110001111