13028729091 has 8 divisors (see below), whose sum is σ = 19853301504. Its totient is φ = 7444988040.

The previous prime is 13028729089. The next prime is 13028729107. The reversal of 13028729091 is 19092782031.

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

It is not a de Polignac number, because 13028729091 - 2¹ = 13028729089 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13028729291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310207815 + ... + 310207856.

It is an arithmetic number, because the mean of its divisors is an integer number (2481662688).

Almost surely, 2^13028729091 is an apocalyptic number.

13028729091 is a deficient number, since it is larger than the sum of its proper divisors (6824572413).

13028729091 is an equidigital number, since it uses as much as digits as its factorization.

13028729091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620415681.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 13028729091 in words is "thirteen billion, twenty-eight million, seven hundred twenty-nine thousand, ninety-one".