8190991729 has 8 divisors (see below), whose sum is σ = 8288908992. Its totient is φ = 8093656080.

The previous prime is 8190991727. The next prime is 8190991741. The reversal of 8190991729 is 9271990918.

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 8190991729 - 2¹ = 8190991727 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 8190991729.

It is not an unprimeable number, because it can be changed into a prime (8190991727) 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 7 ways as a sum of consecutive naturals, for example, 117037 + ... + 173434.

It is an arithmetic number, because the mean of its divisors is an integer number (1036113624).

Almost surely, 2^8190991729 is an apocalyptic number.

It is an amenable number.

8190991729 is a deficient number, since it is larger than the sum of its proper divisors (97917263).

8190991729 is a wasteful number, since it uses less digits than its factorization.

8190991729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290807.

The product of its (nonzero) digits is 734832, while the sum is 55.

The square root of 8190991729 is about 90504.0978575004. The cubic root of 8190991729 is about 2015.7909718905.

The spelling of 8190991729 in words is "eight billion, one hundred ninety million, nine hundred ninety-one thousand, seven hundred twenty-nine".