3939747839 has 2 divisors, whose sum is σ = 3939747840. Its totient is φ = 3939747838.

The previous prime is 3939747821. The next prime is 3939747859. The reversal of 3939747839 is 9387479393.

3939747839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3939747839 - 2⁸ = 3939747583 is a prime.

It is a super-2 number, since 2×3939747839² = 31043226069810339842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3939747859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969873919 + 1969873920.

It is an arithmetic number, because the mean of its divisors is an integer number (1969873920).

Almost surely, 2^3939747839 is an apocalyptic number.

3939747839 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939747839 is an equidigital number, since it uses as much as digits as its factorization.

3939747839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 62.

The square root of 3939747839 is about 62767.4106443782. The cubic root of 3939747839 is about 1579.3903323979.

The spelling of 3939747839 in words is "three billion, nine hundred thirty-nine million, seven hundred forty-seven thousand, eight hundred thirty-nine".