8788991 has 2 divisors, whose sum is σ = 8788992. Its totient is φ = 8788990.

The previous prime is 8788979. The next prime is 8789009. The reversal of 8788991 is 1998878.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8788991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8788931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4394495 + 4394496.

It is an arithmetic number, because the mean of its divisors is an integer number (4394496).

Almost surely, 2^8788991 is an apocalyptic number.

8788991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8788991 is an equidigital number, since it uses as much as digits as its factorization.

8788991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 50.

The square root of 8788991 is about 2964.6232475645. The cubic root of 8788991 is about 206.3698934389.

It can be divided in two parts, 8788 and 991, that added together give a palindrome (9779).

The spelling of 8788991 in words is "eight million, seven hundred eighty-eight thousand, nine hundred ninety-one".