3968039643 has 4 divisors (see below), whose sum is σ = 5290719528. Its totient is φ = 2645359760.

The previous prime is 3968039639. The next prime is 3968039653. The reversal of 3968039643 is 3469308693.

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

It is a cyclic number.

It is not a de Polignac number, because 3968039643 - 2² = 3968039639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3968039653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661339938 + ... + 661339943.

It is an arithmetic number, because the mean of its divisors is an integer number (1322679882).

Almost surely, 2^3968039643 is an apocalyptic number.

3968039643 is a deficient number, since it is larger than the sum of its proper divisors (1322679885).

3968039643 is a wasteful number, since it uses less digits than its factorization.

3968039643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322679884.

The product of its (nonzero) digits is 2519424, while the sum is 51.

The square root of 3968039643 is about 62992.3776579357. The cubic root of 3968039643 is about 1583.1619161227.

The spelling of 3968039643 in words is "three billion, nine hundred sixty-eight million, thirty-nine thousand, six hundred forty-three".