3993909 has 12 divisors (see below), whose sum is σ = 5518656. Its totient is φ = 2569168.

The previous prime is 3993907. The next prime is 3993911. The reversal of 3993909 is 9093993.

It is an interprime number because it is at equal distance from previous prime (3993907) and next prime (3993911).

It is not a de Polignac number, because 3993909 - 2¹ = 3993907 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

3993909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993901) 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 11 ways as a sum of consecutive naturals, for example, 1732 + ... + 3314.

It is an arithmetic number, because the mean of its divisors is an integer number (459888).

Almost surely, 2^3993909 is an apocalyptic number.

It is an amenable number.

3993909 is a deficient number, since it is larger than the sum of its proper divisors (1524747).

3993909 is a wasteful number, since it uses less digits than its factorization.

3993909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1615 counting only the distinct ones).

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

The square root of 3993909 is about 1998.4766698663. The cubic root of 3993909 is about 158.6594904325.

The spelling of 3993909 in words is "three million, nine hundred ninety-three thousand, nine hundred nine".