3811963 has 4 divisors (see below), whose sum is σ = 3943440. Its totient is φ = 3680488.

The previous prime is 3811949. The next prime is 3811967. The reversal of 3811963 is 3691183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3811963 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3811963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3811967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65695 + ... + 65752.

It is an arithmetic number, because the mean of its divisors is an integer number (985860).

Almost surely, 2^3811963 is an apocalyptic number.

3811963 is a deficient number, since it is larger than the sum of its proper divisors (131477).

3811963 is a wasteful number, since it uses less digits than its factorization.

3811963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131476.

The product of its digits is 3888, while the sum is 31.

The square root of 3811963 is about 1952.4249025251. The cubic root of 3811963 is about 156.2126592370.

It can be divided in two parts, 3811 and 963, that added together give a palindrome (4774).

The spelling of 3811963 in words is "three million, eight hundred eleven thousand, nine hundred sixty-three".