8728123 has 4 divisors (see below), whose sum is σ = 9241560. Its totient is φ = 8214688.

The previous prime is 8728079. The next prime is 8728129. The reversal of 8728123 is 3218278.

8728123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8728123 - 2⁹ = 8727611 is a prime.

It is a super-2 number, since 2×8728123² = 152360262206258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256693 + ... + 256726.

It is an arithmetic number, because the mean of its divisors is an integer number (2310390).

Almost surely, 2^8728123 is an apocalyptic number.

8728123 is a deficient number, since it is larger than the sum of its proper divisors (513437).

8728123 is a wasteful number, since it uses less digits than its factorization.

8728123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513436.

The product of its digits is 5376, while the sum is 31.

The square root of 8728123 is about 2954.3396893384. The cubic root of 8728123 is about 205.8923857440.

The spelling of 8728123 in words is "eight million, seven hundred twenty-eight thousand, one hundred twenty-three".