8729071 has 4 divisors (see below), whose sum is σ = 9400552. Its totient is φ = 8057592.

The previous prime is 8729059. The next prime is 8729081. The reversal of 8729071 is 1709278.

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 8729071 - 2⁷ = 8728943 is a prime.

It is the 2955-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729051) by changing a digit.

It is a nontrivial repunit in base 2954.

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, 335721 + ... + 335746.

It is an arithmetic number, because the mean of its divisors is an integer number (2350138).

Almost surely, 2^8729071 is an apocalyptic number.

8729071 is a deficient number, since it is larger than the sum of its proper divisors (671481).

8729071 is a wasteful number, since it uses less digits than its factorization.

8729071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671480.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 8729071 is about 2954.5001269250. The cubic root of 8729071 is about 205.8998397680.

The spelling of 8729071 in words is "eight million, seven hundred twenty-nine thousand, seventy-one".