8917799887 has 2 divisors, whose sum is σ = 8917799888. Its totient is φ = 8917799886.

The previous prime is 8917799801. The next prime is 8917799921. The reversal of 8917799887 is 7889977198.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8917799887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8917799087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4458899943 + 4458899944.

It is an arithmetic number, because the mean of its divisors is an integer number (4458899944).

Almost surely, 2^8917799887 is an apocalyptic number.

8917799887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8917799887 is an equidigital number, since it uses as much as digits as its factorization.

8917799887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 73.

The square root of 8917799887 is about 94434.1034107912. The cubic root of 8917799887 is about 2073.7317366761.

The spelling of 8917799887 in words is "eight billion, nine hundred seventeen million, seven hundred ninety-nine thousand, eight hundred eighty-seven".