3939909 has 8 divisors (see below), whose sum is σ = 5305632. Its totient is φ = 2600400.

The previous prime is 3939907. The next prime is 3939917. The reversal of 3939909 is 9099393.

3939909 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 not a de Polignac number, because 3939909 - 2¹ = 3939907 is a prime.

3939909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939907) 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, 6199 + ... + 6804.

It is an arithmetic number, because the mean of its divisors is an integer number (663204).

Almost surely, 2^3939909 is an apocalyptic number.

It is an amenable number.

3939909 is a deficient number, since it is larger than the sum of its proper divisors (1365723).

3939909 is a wasteful number, since it uses less digits than its factorization.

3939909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107.

The product of its (nonzero) digits is 59049, while the sum is 42.

The square root of 3939909 is about 1984.9204014267. The cubic root of 3939909 is about 157.9411867842.

The spelling of 3939909 in words is "three million, nine hundred thirty-nine thousand, nine hundred nine".