8091528989 has 4 divisors (see below), whose sum is σ = 8370547260. Its totient is φ = 7812510720.

The previous prime is 8091528979. The next prime is 8091529009. The reversal of 8091528989 is 9898251908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6271056100 + 1820472889 = 79190^2 + 42667^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091528989 - 2³² = 3796561693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091528959) 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 3 ways as a sum of consecutive naturals, for example, 139509092 + ... + 139509149.

It is an arithmetic number, because the mean of its divisors is an integer number (2092636815).

Almost surely, 2^8091528989 is an apocalyptic number.

It is an amenable number.

8091528989 is a deficient number, since it is larger than the sum of its proper divisors (279018271).

8091528989 is a wasteful number, since it uses less digits than its factorization.

8091528989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279018270.

The product of its (nonzero) digits is 3732480, while the sum is 59.

The square root of 8091528989 is about 89952.9265171512. The cubic root of 8091528989 is about 2007.5985105092.

The spelling of 8091528989 in words is "eight billion, ninety-one million, five hundred twenty-eight thousand, nine hundred eighty-nine".