3929489647 has 8 divisors (see below), whose sum is σ = 4068955440. Its totient is φ = 3790288320.

The previous prime is 3929489639. The next prime is 3929489657. The reversal of 3929489647 is 7469849293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3929489647 - 2³ = 3929489639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3929489657) 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, 35629 + ... + 95542.

It is an arithmetic number, because the mean of its divisors is an integer number (508619430).

Almost surely, 2^3929489647 is an apocalyptic number.

3929489647 is a deficient number, since it is larger than the sum of its proper divisors (139465793).

3929489647 is a wasteful number, since it uses less digits than its factorization.

3929489647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132233.

The product of its digits is 23514624, while the sum is 61.

The square root of 3929489647 is about 62685.6414739452. The cubic root of 3929489647 is about 1578.0183519118.

The spelling of 3929489647 in words is "three billion, nine hundred twenty-nine million, four hundred eighty-nine thousand, six hundred forty-seven".