3871939 has 8 divisors (see below), whose sum is σ = 4002768. Its totient is φ = 3742560.

The previous prime is 3871921. The next prime is 3871961. The reversal of 3871939 is 9391783.

3871939 is digitally balanced in base 2, 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 3871939 - 2⁷ = 3871811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3871909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8169 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (500346).

Almost surely, 2^3871939 is an apocalyptic number.

3871939 is a deficient number, since it is larger than the sum of its proper divisors (130829).

3871939 is a wasteful number, since it uses less digits than its factorization.

3871939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 40824, while the sum is 40.

The square root of 3871939 is about 1967.7243201221. The cubic root of 3871939 is about 157.0276635906.

The spelling of 3871939 in words is "three million, eight hundred seventy-one thousand, nine hundred thirty-nine".