13028587729 has 4 divisors (see below), whose sum is σ = 13155078976. Its totient is φ = 12902096484.

The previous prime is 13028587727. The next prime is 13028587777. The reversal of 13028587729 is 92778582031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92778582031 = 181 ⋅512588851.

It is a cyclic number.

It is not a de Polignac number, because 13028587729 - 2¹ = 13028587727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13028587723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63245469 + ... + 63245674.

It is an arithmetic number, because the mean of its divisors is an integer number (3288769744).

Almost surely, 2^13028587729 is an apocalyptic number.

It is an amenable number.

13028587729 is a deficient number, since it is larger than the sum of its proper divisors (126491247).

13028587729 is a wasteful number, since it uses less digits than its factorization.

13028587729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126491246.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 13028587729 in words is "thirteen billion, twenty-eight million, five hundred eighty-seven thousand, seven hundred twenty-nine".