3689309 has 4 divisors (see below), whose sum is σ = 3973116. Its totient is φ = 3405504.

The previous prime is 3689299. The next prime is 3689311. The reversal of 3689309 is 9039863.

It is a happy number.

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 850084 + 2839225 = 922^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3689309 - 2¹⁶ = 3623773 is a prime.

It is a super-2 number, since 2×3689309² = 27222001794962, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3689009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141884 + ... + 141909.

It is an arithmetic number, because the mean of its divisors is an integer number (993279).

Almost surely, 2^3689309 is an apocalyptic number.

It is an amenable number.

3689309 is a deficient number, since it is larger than the sum of its proper divisors (283807).

3689309 is a wasteful number, since it uses less digits than its factorization.

3689309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283806.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 3689309 is about 1920.7574026930. The cubic root of 3689309 is about 154.5189246586.

The spelling of 3689309 in words is "three million, six hundred eighty-nine thousand, three hundred nine".