It is a happy number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9683 = 23 ⋅421.
It is a cyclic number.
It is a Duffinian number.
It is a plaindrome in base 15.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3869.
23869 is an apocalyptic number.
It is an amenable number.
3869 is an equidigital number, since it uses as much as digits as its factorization.
3869 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 126.
The square root of 3869 is about 62.2012861603. The cubic root of 3869 is about 15.6987922854.
The spelling of 3869 in words is "three thousand, eight hundred sixty-nine".