3939443929 has 8 divisors (see below), whose sum is σ = 3975366600. Its totient is φ = 3903648000.

The previous prime is 3939443917. The next prime is 3939443939. The reversal of 3939443929 is 9293449393.

It can be written as a sum of positive squares in 4 ways, for example, as 707294025 + 3232149904 = 26595^2 + 56852^2 .

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 3939443929 - 2⁷ = 3939443801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939443929.

It is not an unprimeable number, because it can be changed into a prime (3939443939) 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, 31329 + ... + 94129.

It is an arithmetic number, because the mean of its divisors is an integer number (496920825).

Almost surely, 2^3939443929 is an apocalyptic number.

It is an amenable number.

3939443929 is a deficient number, since it is larger than the sum of its proper divisors (35922671).

3939443929 is a wasteful number, since it uses less digits than its factorization.

3939443929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63371.

The product of its digits is 5668704, while the sum is 55.

The square root of 3939443929 is about 62764.9896757739. The cubic root of 3939443929 is about 1579.3497202506.

The spelling of 3939443929 in words is "three billion, nine hundred thirty-nine million, four hundred forty-three thousand, nine hundred twenty-nine".