6728742029 has 4 divisors (see below), whose sum is σ = 6728918784. Its totient is φ = 6728565276.

The previous prime is 6728741959. The next prime is 6728742073. The reversal of 6728742029 is 9202478276.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6728742029 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 (6728742089) 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, 5147 + ... + 116120.

It is an arithmetic number, because the mean of its divisors is an integer number (1682229696).

Almost surely, 2^6728742029 is an apocalyptic number.

It is an amenable number.

6728742029 is a deficient number, since it is larger than the sum of its proper divisors (176755).

6728742029 is a wasteful number, since it uses less digits than its factorization.

6728742029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176754.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 6728742029 is about 82028.9097148073. The cubic root of 6728742029 is about 1887.8955355104.

The spelling of 6728742029 in words is "six billion, seven hundred twenty-eight million, seven hundred forty-two thousand, twenty-nine".