3900987 has 8 divisors (see below), whose sum is σ = 5779280. Its totient is φ = 2600640.

The previous prime is 3900943. The next prime is 3900989. The reversal of 3900987 is 7890093.

It is not a de Polignac number, because 3900987 - 2¹⁰ = 3899963 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900989) 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, 72214 + ... + 72267.

It is an arithmetic number, because the mean of its divisors is an integer number (722410).

Almost surely, 2^3900987 is an apocalyptic number.

3900987 is a deficient number, since it is larger than the sum of its proper divisors (1878293).

3900987 is a wasteful number, since it uses less digits than its factorization.

3900987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144490 (or 144484 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 3900987 is about 1975.0916434434. The cubic root of 3900987 is about 157.4193691596.

The spelling of 3900987 in words is "three million, nine hundred thousand, nine hundred eighty-seven".