3693209 has 4 divisors (see below), whose sum is σ = 3977316. Its totient is φ = 3409104.

The previous prime is 3693203. The next prime is 3693211. The reversal of 3693209 is 9023963.

3693209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 1149184 = 1595^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 3693209 - 2¹² = 3689113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3693203) 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 3 ways as a sum of consecutive naturals, for example, 142034 + ... + 142059.

It is an arithmetic number, because the mean of its divisors is an integer number (994329).

Almost surely, 2^3693209 is an apocalyptic number.

It is an amenable number.

3693209 is a deficient number, since it is larger than the sum of its proper divisors (284107).

3693209 is a wasteful number, since it uses less digits than its factorization.

3693209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284106.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 3693209 is about 1921.7723590478. The cubic root of 3693209 is about 154.5733532417.

The spelling of 3693209 in words is "three million, six hundred ninety-three thousand, two hundred nine".