3983991975 has 18 divisors (see below), whose sum is σ = 7135772696. Its totient is φ = 2124795600.

The previous prime is 3983991941. The next prime is 3983991997. The reversal of 3983991975 is 5791993893.

3983991975 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3983991975 - 2⁶ = 3983991911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8853091 + ... + 8853540.

Almost surely, 2^3983991975 is an apocalyptic number.

3983991975 is a deficient number, since it is larger than the sum of its proper divisors (3151780721).

3983991975 is a wasteful number, since it uses less digits than its factorization.

3983991975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17706647 (or 17706639 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The square root of 3983991975 is about 63118.8717817421. The cubic root of 3983991975 is about 1585.2806244824.

The spelling of 3983991975 in words is "three billion, nine hundred eighty-three million, nine hundred ninety-one thousand, nine hundred seventy-five".