3938139 has 10 divisors (see below), whose sum is σ = 5883020. Its totient is φ = 2625372.

The previous prime is 3938119. The next prime is 3938141. The reversal of 3938139 is 9318393.

It is not a de Polignac number, because 3938139 - 2⁵ = 3938107 is a prime.

It is a Duffinian number.

3938139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3938119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24229 + ... + 24390.

It is an arithmetic number, because the mean of its divisors is an integer number (588302).

Almost surely, 2^3938139 is an apocalyptic number.

3938139 is a deficient number, since it is larger than the sum of its proper divisors (1944881).

3938139 is an equidigital number, since it uses as much as digits as its factorization.

3938139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48631 (or 48622 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3938139 is about 1984.4744896320. The cubic root of 3938139 is about 157.9175316038.

The spelling of 3938139 in words is "three million, nine hundred thirty-eight thousand, one hundred thirty-nine".