8190709891 has 12 divisors (see below), whose sum is σ = 10136264592. Its totient is φ = 6480560736.

The previous prime is 8190709873. The next prime is 8190709903. The reversal of 8190709891 is 1989070918.

It is not a de Polignac number, because 8190709891 - 2⁹ = 8190709379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8190709291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3460656 + ... + 3463021.

It is an arithmetic number, because the mean of its divisors is an integer number (844688716).

Almost surely, 2^8190709891 is an apocalyptic number.

8190709891 is a deficient number, since it is larger than the sum of its proper divisors (1945554701).

8190709891 is a wasteful number, since it uses less digits than its factorization.

8190709891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923710 (or 6923697 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 52.

The square root of 8190709891 is about 90502.5407985875. The cubic root of 8190709891 is about 2015.7678516534.

The spelling of 8190709891 in words is "eight billion, one hundred ninety million, seven hundred nine thousand, eight hundred ninety-one".