8128491343 has 8 divisors (see below), whose sum is σ = 9323985920. Its totient is φ = 6941567160.

The previous prime is 8128491331. The next prime is 8128491353. The reversal of 8128491343 is 3431948218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8128491343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8128491343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128491313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140563 + ... + 2144356.

It is an arithmetic number, because the mean of its divisors is an integer number (1165498240).

Almost surely, 2^8128491343 is an apocalyptic number.

8128491343 is a deficient number, since it is larger than the sum of its proper divisors (1195494577).

8128491343 is a wasteful number, since it uses less digits than its factorization.

8128491343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285197.

The product of its digits is 165888, while the sum is 43.

The square root of 8128491343 is about 90158.1462930555. The cubic root of 8128491343 is about 2010.6507915514.

The spelling of 8128491343 in words is "eight billion, one hundred twenty-eight million, four hundred ninety-one thousand, three hundred forty-three".