8471109891 has 32 divisors (see below), whose sum is σ = 12002918400. Its totient is φ = 5299201440.

The previous prime is 8471109851. The next prime is 8471109901. The reversal of 8471109891 is 1989011748.

It is not a de Polignac number, because 8471109891 - 2⁷ = 8471109763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8471109891.

It is not an unprimeable number, because it can be changed into a prime (8471109841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6622590 + ... + 6623868.

It is an arithmetic number, because the mean of its divisors is an integer number (375091200).

Almost surely, 2^8471109891 is an apocalyptic number.

8471109891 is a deficient number, since it is larger than the sum of its proper divisors (3531808509).

8471109891 is a wasteful number, since it uses less digits than its factorization.

8471109891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319.

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 8471109891 is about 92038.6326006639. The cubic root of 8471109891 is about 2038.5127801754.

The spelling of 8471109891 in words is "eight billion, four hundred seventy-one million, one hundred nine thousand, eight hundred ninety-one".