3965930643 has 18 divisors (see below), whose sum is σ = 5354914476. Its totient is φ = 2610867072.

The previous prime is 3965930627. The next prime is 3965930701. The reversal of 3965930643 is 3460395693.

It is a happy number.

3965930643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3965930643 - 2⁴ = 3965930627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3965930592 and 3965930601.

It is not an unprimeable number, because it can be changed into a prime (3965930543) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11234755 + ... + 11235107.

Almost surely, 2^3965930643 is an apocalyptic number.

3965930643 is a deficient number, since it is larger than the sum of its proper divisors (1388983833).

3965930643 is an frugal number, since it uses more digits than its factorization.

3965930643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 48.

The square root of 3965930643 is about 62975.6353123968. The cubic root of 3965930643 is about 1582.8813846350.

Multiplying 3965930643 by its sum of digits (48), we get a square (190364670864 = 436308²).

The spelling of 3965930643 in words is "three billion, nine hundred sixty-five million, nine hundred thirty thousand, six hundred forty-three".