8791987 has 2 divisors, whose sum is σ = 8791988. Its totient is φ = 8791986.

The previous prime is 8791933. The next prime is 8792027. The reversal of 8791987 is 7891978.

8791987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8791987 - 2¹¹ = 8789939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8791987.

It is not a weakly prime, because it can be changed into another prime (8791187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4395993 + 4395994.

It is an arithmetic number, because the mean of its divisors is an integer number (4395994).

Almost surely, 2^8791987 is an apocalyptic number.

8791987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8791987 is an equidigital number, since it uses as much as digits as its factorization.

8791987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 49.

The square root of 8791987 is about 2965.1284963725. The cubic root of 8791987 is about 206.3933399665.

Subtracting from 8791987 its reverse (7891978), we obtain a palindrome (900009).

The spelling of 8791987 in words is "eight million, seven hundred ninety-one thousand, nine hundred eighty-seven".