3986709 has 8 divisors (see below), whose sum is σ = 5333952. Its totient is φ = 2648640.

The previous prime is 3986699. The next prime is 3986711. The reversal of 3986709 is 9076893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3986709 - 2⁵ = 3986677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1204 + ... + 3069.

It is an arithmetic number, because the mean of its divisors is an integer number (666744).

Almost surely, 2^3986709 is an apocalyptic number.

It is an amenable number.

3986709 is a deficient number, since it is larger than the sum of its proper divisors (1347243).

3986709 is a wasteful number, since it uses less digits than its factorization.

3986709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3986709 is about 1996.6744852379. The cubic root of 3986709 is about 158.5640922087.

The spelling of 3986709 in words is "three million, nine hundred eighty-six thousand, seven hundred nine".