87003987 has 8 divisors (see below), whose sum is σ = 132577536. Its totient is φ = 49716552.

The previous prime is 87003979. The next prime is 87004013. The reversal of 87003987 is 78930078.

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

It is not a de Polignac number, because 87003987 - 2³ = 87003979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87013987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071503 + ... + 2071544.

It is an arithmetic number, because the mean of its divisors is an integer number (16572192).

Almost surely, 2^87003987 is an apocalyptic number.

87003987 is a deficient number, since it is larger than the sum of its proper divisors (45573549).

87003987 is a wasteful number, since it uses less digits than its factorization.

87003987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143057.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 87003987 is about 9327.5927762741. The cubic root of 87003987 is about 443.1115308732. Note that the first 3 decimals are identical.

It can be divided in two parts, 87003 and 987, that added together give a triangular number (87990 = T₄₁₉).

The spelling of 87003987 in words is "eighty-seven million, three thousand, nine hundred eighty-seven".