7872987 has 8 divisors (see below), whose sum is σ = 10516480. Its totient is φ = 5239080.

The previous prime is 7872947. The next prime is 7873001. The reversal of 7872987 is 7892787.

7872987 is digitally balanced in base 4, 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 not a de Polignac number, because 7872987 - 2⁸ = 7872731 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7872937) 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, 187 + ... + 3972.

It is an arithmetic number, because the mean of its divisors is an integer number (1314560).

Almost surely, 2^7872987 is an apocalyptic number.

7872987 is a deficient number, since it is larger than the sum of its proper divisors (2643493).

7872987 is a wasteful number, since it uses less digits than its factorization.

7872987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793.

The product of its digits is 395136, while the sum is 48.

The square root of 7872987 is about 2805.8843525705. The cubic root of 7872987 is about 198.9359069033.

The spelling of 7872987 in words is "seven million, eight hundred seventy-two thousand, nine hundred eighty-seven".