8091989309 has 8 divisors (see below), whose sum is σ = 8172670272. Its totient is φ = 8011349280.

The previous prime is 8091989267. The next prime is 8091989333. The reversal of 8091989309 is 9039891908.

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

It is a cyclic number.

It is not a de Polignac number, because 8091989309 - 2²⁰ = 8090940733 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 (8091989369) 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, 525017 + ... + 540209.

It is an arithmetic number, because the mean of its divisors is an integer number (1021583784).

Almost surely, 2^8091989309 is an apocalyptic number.

It is an amenable number.

8091989309 is a deficient number, since it is larger than the sum of its proper divisors (80680963).

8091989309 is a wasteful number, since it uses less digits than its factorization.

8091989309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20467.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 8091989309 is about 89955.4851523797. The cubic root of 8091989309 is about 2007.6365799612.

The spelling of 8091989309 in words is "eight billion, ninety-one million, nine hundred eighty-nine thousand, three hundred nine".