8147987 has 2 divisors, whose sum is σ = 8147988. Its totient is φ = 8147986.

The previous prime is 8147983. The next prime is 8147999. The reversal of 8147987 is 7897418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8147987 - 2² = 8147983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8147983) 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 as a sum of consecutive naturals, namely, 4073993 + 4073994.

It is an arithmetic number, because the mean of its divisors is an integer number (4073994).

Almost surely, 2^8147987 is an apocalyptic number.

8147987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8147987 is an equidigital number, since it uses as much as digits as its factorization.

8147987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 8147987 is about 2854.4679013785. The cubic root of 8147987 is about 201.2256979773.

The spelling of 8147987 in words is "eight million, one hundred forty-seven thousand, nine hundred eighty-seven".