8728344938723 has 4 divisors (see below), whose sum is σ = 9241776993960. Its totient is φ = 8214912883488.

The previous prime is 8728344938657. The next prime is 8728344938741. The reversal of 8728344938723 is 3278394438278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8728344938723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728344968723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256716027593 + ... + 256716027626.

It is an arithmetic number, because the mean of its divisors is an integer number (2310444248490).

Almost surely, 2^{8728344938723} is an apocalyptic number.

8728344938723 is a deficient number, since it is larger than the sum of its proper divisors (513432055237).

8728344938723 is a wasteful number, since it uses less digits than its factorization.

8728344938723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513432055236.

The product of its digits is 390168576, while the sum is 68.

The spelling of 8728344938723 in words is "eight trillion, seven hundred twenty-eight billion, three hundred forty-four million, nine hundred thirty-eight thousand, seven hundred twenty-three".