3939984839 has 8 divisors (see below), whose sum is σ = 4503288480. Its totient is φ = 3376793376.

The previous prime is 3939984833. The next prime is 3939984857. The reversal of 3939984839 is 9384899393.

3939984839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3939984839 - 2²⁸ = 3671549383 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 (3939984833) 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, 70157 + ... + 113145.

It is an arithmetic number, because the mean of its divisors is an integer number (562911060).

Almost surely, 2^3939984839 is an apocalyptic number.

3939984839 is a deficient number, since it is larger than the sum of its proper divisors (563303641).

3939984839 is a wasteful number, since it uses less digits than its factorization.

3939984839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56089.

The product of its digits is 45349632, while the sum is 65.

The square root of 3939984839 is about 62769.2985383778. The cubic root of 3939984839 is about 1579.4220017685.

The spelling of 3939984839 in words is "three billion, nine hundred thirty-nine million, nine hundred eighty-four thousand, eight hundred thirty-nine".