3963689 has 4 divisors (see below), whose sum is σ = 3968724. Its totient is φ = 3958656.

The previous prime is 3963683. The next prime is 3963709. The reversal of 3963689 is 9863693.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3003289 + 960400 = 1733^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3963689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3963683) 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, 1052 + ... + 3005.

It is an arithmetic number, because the mean of its divisors is an integer number (992181).

Almost surely, 2^3963689 is an apocalyptic number.

It is an amenable number.

3963689 is a deficient number, since it is larger than the sum of its proper divisors (5035).

3963689 is an equidigital number, since it uses as much as digits as its factorization.

3963689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034.

The product of its digits is 209952, while the sum is 44.

The square root of 3963689 is about 1990.9015545727. The cubic root of 3963689 is about 158.2583100405.

The spelling of 3963689 in words is "three million, nine hundred sixty-three thousand, six hundred eighty-nine".