Adding to 3813 its sum of digits (15), we get a triangular number (3828 = T87).
Subtracting from 3813 its product of digits (72), we obtain a triangular number (3741 = T86).
Adding to 3813 its reverse (3183), we get a palindrome (6996).
Subtracting from 3813 its reverse (3183), we obtain a triangular number (630 = T35).
It is a sphenic number, since it is the product of 3 distinct primes.
3813 is a Rhonda number in base 6.
It is a plaindrome in base 12.
It is a nialpdrome in base 16.
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 3813.
It is an amenable number.
3813 is a wasteful number, since it uses less digits than its factorization.
3813 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 75.
The square root of 3813 is about 61.7494939251. The cubic root of 3813 is about 15.6226823229.
The spelling of 3813 in words is "three thousand, eight hundred thirteen".