8019879891 has 8 divisors (see below), whose sum is σ = 10693598160. Its totient is φ = 5346374112.

The previous prime is 8019879887. The next prime is 8019879899. The reversal of 8019879891 is 1989789108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8019879891 - 2² = 8019879887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8019879899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90145 + ... + 155453.

It is an arithmetic number, because the mean of its divisors is an integer number (1336699770).

Almost surely, 2^8019879891 is an apocalyptic number.

8019879891 is a deficient number, since it is larger than the sum of its proper divisors (2673718269).

8019879891 is a wasteful number, since it uses less digits than its factorization.

8019879891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106245.

The product of its (nonzero) digits is 2612736, while the sum is 60.

The square root of 8019879891 is about 89553.7821144367. The cubic root of 8019879891 is about 2001.6552872175.

The spelling of 8019879891 in words is "eight billion, nineteen million, eight hundred seventy-nine thousand, eight hundred ninety-one".