3947687 has 8 divisors (see below), whose sum is σ = 4182960. Its totient is φ = 3715200.

The previous prime is 3947663. The next prime is 3947693. The reversal of 3947687 is 7867493.

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

It is a cyclic number.

It is not a de Polignac number, because 3947687 - 2⁶ = 3947623 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 (3947627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (522870).

Almost surely, 2^3947687 is an apocalyptic number.

3947687 is a deficient number, since it is larger than the sum of its proper divisors (235273).

3947687 is a wasteful number, since it uses less digits than its factorization.

3947687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its digits is 254016, while the sum is 44.

The square root of 3947687 is about 1986.8787079236. The cubic root of 3947687 is about 158.0450520461.

The spelling of 3947687 in words is "three million, nine hundred forty-seven thousand, six hundred eighty-seven".