8397987 has 16 divisors (see below), whose sum is σ = 12112800. Its totient is φ = 5144832.

The previous prime is 8397971. The next prime is 8398003. The reversal of 8397987 is 7897938.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8397971) and next prime (8398003).

It is not a de Polignac number, because 8397987 - 2⁴ = 8397971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8397947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13303 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (757050).

Almost surely, 2^8397987 is an apocalyptic number.

8397987 is a deficient number, since it is larger than the sum of its proper divisors (3714813).

8397987 is a wasteful number, since it uses less digits than its factorization.

8397987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 762048, while the sum is 51.

The square root of 8397987 is about 2897.9280529371. The cubic root of 8397987 is about 203.2630319239.

The spelling of 8397987 in words is "eight million, three hundred ninety-seven thousand, nine hundred eighty-seven".