8872729 has 4 divisors (see below), whose sum is σ = 8958976. Its totient is φ = 8786484.

The previous prime is 8872723. The next prime is 8872739. The reversal of 8872729 is 9272788.

8872729 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8872729 - 2⁵ = 8872697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8872723) 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 3 ways as a sum of consecutive naturals, for example, 42969 + ... + 43174.

It is an arithmetic number, because the mean of its divisors is an integer number (2239744).

Almost surely, 2^8872729 is an apocalyptic number.

It is an amenable number.

8872729 is a deficient number, since it is larger than the sum of its proper divisors (86247).

8872729 is a wasteful number, since it uses less digits than its factorization.

8872729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86246.

The product of its digits is 112896, while the sum is 43.

The square root of 8872729 is about 2978.7126413939. The cubic root of 8872729 is about 207.0232262517.

The spelling of 8872729 in words is "eight million, eight hundred seventy-two thousand, seven hundred twenty-nine".