4003987 has 8 divisors (see below), whose sum is σ = 4377296. Its totient is φ = 3640032.

The previous prime is 4003981. The next prime is 4003999. The reversal of 4003987 is 7893004.

It is a happy number.

4003987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4003987 - 2¹¹ = 4001939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4003981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428 + ... + 3169.

It is an arithmetic number, because the mean of its divisors is an integer number (547162).

Almost surely, 2^4003987 is an apocalyptic number.

4003987 is a deficient number, since it is larger than the sum of its proper divisors (373309).

4003987 is a wasteful number, since it uses less digits than its factorization.

4003987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 4003987 is about 2000.9965017461. The cubic root of 4003987 is about 158.7928290831.

The spelling of 4003987 in words is "four million, three thousand, nine hundred eighty-seven".