3971639346 has 16 divisors (see below), whose sum is σ = 7957245600. Its totient is φ = 1321551968.

The previous prime is 3971639341. The next prime is 3971639351. The reversal of 3971639346 is 6439361793.

3971639346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3971639341) and next prime (3971639351).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3971639341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578256 + ... + 585083.

It is an arithmetic number, because the mean of its divisors is an integer number (497327850).

Almost surely, 2^3971639346 is an apocalyptic number.

3971639346 is an abundant number, since it is smaller than the sum of its proper divisors (3985606254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3971639346 is a wasteful number, since it uses less digits than its factorization.

3971639346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163913.

The product of its digits is 2204496, while the sum is 51.

The square root of 3971639346 is about 63020.9437092146. The cubic root of 3971639346 is about 1583.6405059535.

The spelling of 3971639346 in words is "three billion, nine hundred seventy-one million, six hundred thirty-nine thousand, three hundred forty-six".