3986309 has 2 divisors, whose sum is σ = 3986310. Its totient is φ = 3986308.

The previous prime is 3986303. The next prime is 3986329. The reversal of 3986309 is 9036893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 1329409 = 1630^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 3986309 - 2⁴ = 3986293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3986303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993154 + 1993155.

It is an arithmetic number, because the mean of its divisors is an integer number (1993155).

Almost surely, 2^3986309 is an apocalyptic number.

It is an amenable number.

3986309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986309 is an equidigital number, since it uses as much as digits as its factorization.

3986309 is an evil number, because the sum of its binary digits is even.

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

The square root of 3986309 is about 1996.5743161726. The cubic root of 3986309 is about 158.5587889408.

The spelling of 3986309 in words is "three million, nine hundred eighty-six thousand, three hundred nine".