3987673 has 8 divisors (see below), whose sum is σ = 4257792. Its totient is φ = 3721536.

The previous prime is 3987649. The next prime is 3987677. The reversal of 3987673 is 3767893.

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 3987673 - 2²¹ = 1890521 is a prime.

It is an Ulam number.

It is a Duffinian number.

3987673 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3987677) 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, 1236 + ... + 3082.

It is an arithmetic number, because the mean of its divisors is an integer number (532224).

Almost surely, 2^3987673 is an apocalyptic number.

It is an amenable number.

3987673 is a deficient number, since it is larger than the sum of its proper divisors (270119).

3987673 is a wasteful number, since it uses less digits than its factorization.

3987673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991.

The product of its digits is 190512, while the sum is 43.

The square root of 3987673 is about 1996.9158720387. The cubic root of 3987673 is about 158.5768716271.

The spelling of 3987673 in words is "three million, nine hundred eighty-seven thousand, six hundred seventy-three".