8506729 has 8 divisors (see below), whose sum is σ = 10605888. Its totient is φ = 6628560.

The previous prime is 8506717. The next prime is 8506759. The reversal of 8506729 is 9276058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8506729 - 2²¹ = 6409577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8506759) 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 7 ways as a sum of consecutive naturals, for example, 55162 + ... + 55315.

It is an arithmetic number, because the mean of its divisors is an integer number (1325736).

Almost surely, 2^8506729 is an apocalyptic number.

It is an amenable number.

8506729 is a deficient number, since it is larger than the sum of its proper divisors (2099159).

8506729 is a wasteful number, since it uses less digits than its factorization.

8506729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110495.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 8506729 is about 2916.6297330995. The cubic root of 8506729 is about 204.1365947286.

The spelling of 8506729 in words is "eight million, five hundred six thousand, seven hundred twenty-nine".