8861987 has 2 divisors, whose sum is σ = 8861988. Its totient is φ = 8861986.

The previous prime is 8861929. The next prime is 8861989. The reversal of 8861987 is 7891688.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8861987 - 2¹⁰ = 8860963 is a prime.

Together with 8861989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8861989) 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, 4430993 + 4430994.

It is an arithmetic number, because the mean of its divisors is an integer number (4430994).

Almost surely, 2^8861987 is an apocalyptic number.

8861987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8861987 is an equidigital number, since it uses as much as digits as its factorization.

8861987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 8861987 is about 2976.9089673687. The cubic root of 8861987 is about 206.9396464966.

Subtracting from 8861987 its reverse (7891688), we obtain a cube (970299 = 99³).

The spelling of 8861987 in words is "eight million, eight hundred sixty-one thousand, nine hundred eighty-seven".