3963842643 has 16 divisors (see below), whose sum is σ = 5576170880. Its totient is φ = 2497682304.

The previous prime is 3963842581. The next prime is 3963842651. The reversal of 3963842643 is 3462483693.

It is a happy number.

It is not a de Polignac number, because 3963842643 - 2⁹ = 3963842131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3963842592 and 3963842601.

It is not an unprimeable number, because it can be changed into a prime (3963842693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55621 + ... + 104982.

It is an arithmetic number, because the mean of its divisors is an integer number (348510680).

Almost surely, 2^3963842643 is an apocalyptic number.

3963842643 is a deficient number, since it is larger than the sum of its proper divisors (1612328237).

3963842643 is a wasteful number, since it uses less digits than its factorization.

3963842643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161058.

The product of its digits is 2239488, while the sum is 48.

The square root of 3963842643 is about 62959.0552899263. The cubic root of 3963842643 is about 1582.6035485003.

The spelling of 3963842643 in words is "three billion, nine hundred sixty-three million, eight hundred forty-two thousand, six hundred forty-three".