3946121930 has 16 divisors (see below), whose sum is σ = 7347951720. Its totient is φ = 1524019392.

The previous prime is 3946121917. The next prime is 3946121939. The reversal of 3946121930 is 391216493.

3946121930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3471448561 + 474673369 = 58919^2 + 21787^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3946121939) 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, 6803369 + ... + 6803948.

Almost surely, 2^3946121930 is an apocalyptic number.

3946121930 is a deficient number, since it is larger than the sum of its proper divisors (3401829790).

3946121930 is a wasteful number, since it uses less digits than its factorization.

3946121930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607353.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 3946121930 is about 62818.1656051814. The cubic root of 3946121930 is about 1580.2416350517.

The spelling of 3946121930 in words is "three billion, nine hundred forty-six million, one hundred twenty-one thousand, nine hundred thirty".