8671987 has 2 divisors, whose sum is σ = 8671988. Its totient is φ = 8671986.

The previous prime is 8671981. The next prime is 8671991. The reversal of 8671987 is 7891768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8671987 - 2³ = 8671979 is a prime.

It is not a weakly prime, because it can be changed into another prime (8671981) 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, 4335993 + 4335994.

It is an arithmetic number, because the mean of its divisors is an integer number (4335994).

Almost surely, 2^8671987 is an apocalyptic number.

8671987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8671987 is an equidigital number, since it uses as much as digits as its factorization.

8671987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 46.

The square root of 8671987 is about 2944.8237638270. The cubic root of 8671987 is about 205.4500285983.

The spelling of 8671987 in words is "eight million, six hundred seventy-one thousand, nine hundred eighty-seven".