3866309 has 4 divisors (see below), whose sum is σ = 3999660. Its totient is φ = 3732960.

The previous prime is 3866287. The next prime is 3866333. The reversal of 3866309 is 9036683.

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 2815684 + 1050625 = 1678^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3866309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866399) 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, 66632 + ... + 66689.

It is an arithmetic number, because the mean of its divisors is an integer number (999915).

Almost surely, 2^3866309 is an apocalyptic number.

It is an amenable number.

3866309 is a deficient number, since it is larger than the sum of its proper divisors (133351).

3866309 is a wasteful number, since it uses less digits than its factorization.

3866309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133350.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3866309 is about 1966.2932131297. The cubic root of 3866309 is about 156.9515178847.

The spelling of 3866309 in words is "three million, eight hundred sixty-six thousand, three hundred nine".