3963813 has 8 divisors (see below), whose sum is σ = 6040128. Its totient is φ = 2265024.

The previous prime is 3963809. The next prime is 3963829. The reversal of 3963813 is 3183693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3963813 - 2² = 3963809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3963803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94356 + ... + 94397.

It is an arithmetic number, because the mean of its divisors is an integer number (755016).

Almost surely, 2^3963813 is an apocalyptic number.

It is an amenable number.

3963813 is a deficient number, since it is larger than the sum of its proper divisors (2076315).

3963813 is a wasteful number, since it uses less digits than its factorization.

3963813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188763.

The product of its digits is 11664, while the sum is 33.

The square root of 3963813 is about 1990.9326959995. The cubic root of 3963813 is about 158.2599603403.

The spelling of 3963813 in words is "three million, nine hundred sixty-three thousand, eight hundred thirteen".