8731009 has 8 divisors (see below), whose sum is σ = 10070720. Its totient is φ = 7414416.

The previous prime is 8730983. The next prime is 8731027. The reversal of 8731009 is 9001378.

8731009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8731009 - 2⁵ = 8730977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8731039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4959 + ... + 6484.

It is an arithmetic number, because the mean of its divisors is an integer number (1258840).

Almost surely, 2^8731009 is an apocalyptic number.

It is an amenable number.

8731009 is a deficient number, since it is larger than the sum of its proper divisors (1339711).

8731009 is a wasteful number, since it uses less digits than its factorization.

8731009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11559.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 8731009 is about 2954.8280829855. The cubic root of 8731009 is about 205.9150763784.

The spelling of 8731009 in words is "eight million, seven hundred thirty-one thousand, nine".