3986687 has 4 divisors (see below), whose sum is σ = 4221216. Its totient is φ = 3752160.

The previous prime is 3986677. The next prime is 3986699. The reversal of 3986687 is 7866893.

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

It is a cyclic number.

It is not a de Polignac number, because 3986687 - 2⁶ = 3986623 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 (3986617) 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, 117239 + ... + 117272.

It is an arithmetic number, because the mean of its divisors is an integer number (1055304).

Almost surely, 2^3986687 is an apocalyptic number.

3986687 is a deficient number, since it is larger than the sum of its proper divisors (234529).

3986687 is a wasteful number, since it uses less digits than its factorization.

3986687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234528.

The product of its digits is 435456, while the sum is 47.

The square root of 3986687 is about 1996.6689760699. The cubic root of 3986687 is about 158.5638005382.

The spelling of 3986687 in words is "three million, nine hundred eighty-six thousand, six hundred eighty-seven".