3989

3989 is a natural number that follows 3988 and precedes 3990. It is odd and, since no prime number up to 61 divides it, it is considered a prime number.

In base 10 it is written as 3989. In binary it is 111110010101. In hexadecimal it is 0xF95. In Roman numerals it can be expressed as MMMCMLXXXIX.

Its digits sum to 29, giving a digital root of 2. It is not divisible by 2, 3, or 5. It is not a perfect square (63^2 = 3969 and 64^2 = 4096) and it is not a triangular number (the equation n(n+1)/2 = 3989 has no integer solution).

Beyond its basic properties as a relatively small prime, 3989 has no widely noted mathematical significance. It is primarily of interest in discussions of primality and number representations.