3939447 has 8 divisors (see below), whose sum is σ = 5433840. Its totient is φ = 2535680.

The previous prime is 3939443. The next prime is 3939457. The reversal of 3939447 is 7449393.

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 3939447 - 2² = 3939443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939443) 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 7 ways as a sum of consecutive naturals, for example, 22554 + ... + 22727.

It is an arithmetic number, because the mean of its divisors is an integer number (679230).

Almost surely, 2^3939447 is an apocalyptic number.

3939447 is a deficient number, since it is larger than the sum of its proper divisors (1494393).

3939447 is a wasteful number, since it uses less digits than its factorization.

3939447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45313.

The product of its digits is 81648, while the sum is 39.

The square root of 3939447 is about 1984.8040205522. The cubic root of 3939447 is about 157.9350130645.

The spelling of 3939447 in words is "three million, nine hundred thirty-nine thousand, four hundred forty-seven".