3993309 has 6 divisors (see below), whose sum is σ = 5768126. Its totient is φ = 2662200.

The previous prime is 3993263. The next prime is 3993313. The reversal of 3993309 is 9033993.

It can be written as a sum of positive squares in only one way, i.e., 3790809 + 202500 = 1947^2 + 450^2 .

It is not a de Polignac number, because 3993309 - 2⁹ = 3992797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221842 + ... + 221859.

Almost surely, 2^3993309 is an apocalyptic number.

It is an amenable number.

3993309 is a deficient number, since it is larger than the sum of its proper divisors (1774817).

3993309 is a wasteful number, since it uses less digits than its factorization.

3993309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443707 (or 443704 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 36.

The square root of 3993309 is about 1998.3265498912. The cubic root of 3993309 is about 158.6515449617.

The spelling of 3993309 in words is "three million, nine hundred ninety-three thousand, three hundred nine".