8243061891 has 8 divisors (see below), whose sum is σ = 11012601600. Its totient is φ = 5484448392.

The previous prime is 8243061863. The next prime is 8243061899. The reversal of 8243061891 is 1981603428.

8243061891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8243061891 - 2¹⁰ = 8243060867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8243061899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2729791 + ... + 2732808.

It is an arithmetic number, because the mean of its divisors is an integer number (1376575200).

Almost surely, 2^8243061891 is an apocalyptic number.

8243061891 is a deficient number, since it is larger than the sum of its proper divisors (2769539709).

8243061891 is a wasteful number, since it uses less digits than its factorization.

8243061891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463105.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 8243061891 is about 90791.3095565870. The cubic root of 8243061891 is about 2020.0534158178.

The spelling of 8243061891 in words is "eight billion, two hundred forty-three million, sixty-one thousand, eight hundred ninety-one".