8719398891 has 24 divisors (see below), whose sum is σ = 14451300864. Its totient is φ = 4962654000.

The previous prime is 8719398887. The next prime is 8719398893. The reversal of 8719398891 is 1988939178.

It is not a de Polignac number, because 8719398891 - 2² = 8719398887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (8719398893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259891 + ... + 291516.

It is an arithmetic number, because the mean of its divisors is an integer number (602137536).

Almost surely, 2^8719398891 is an apocalyptic number.

8719398891 is a deficient number, since it is larger than the sum of its proper divisors (5731901973).

8719398891 is a wasteful number, since it uses less digits than its factorization.

8719398891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551671 (or 551668 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 63.

The square root of 8719398891 is about 93377.7215988910. The cubic root of 8719398891 is about 2058.2376364294.

The spelling of 8719398891 in words is "eight billion, seven hundred nineteen million, three hundred ninety-eight thousand, eight hundred ninety-one".