3994871975 has 24 divisors (see below), whose sum is σ = 4986347520. Its totient is φ = 3174876000.

The previous prime is 3994871927. The next prime is 3994871977. The reversal of 3994871975 is 5791784993.

It is not a de Polignac number, because 3994871975 - 2¹⁰ = 3994870951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994871977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3244610 + ... + 3245840.

It is an arithmetic number, because the mean of its divisors is an integer number (207764480).

Almost surely, 2^3994871975 is an apocalyptic number.

3994871975 is a deficient number, since it is larger than the sum of its proper divisors (991475545).

3994871975 is a wasteful number, since it uses less digits than its factorization.

3994871975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991 (or 1986 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 62.

The square root of 3994871975 is about 63204.9996044617. Note that the first 3 decimals coincide. The cubic root of 3994871975 is about 1586.7224091875.

The spelling of 3994871975 in words is "three billion, nine hundred ninety-four million, eight hundred seventy-one thousand, nine hundred seventy-five".