8709009 has 4 divisors (see below), whose sum is σ = 11612016. Its totient is φ = 5806004.

The previous prime is 8709007. The next prime is 8709059. The reversal of 8709009 is 9009078.

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 8709009 - 2¹ = 8709007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8709007) 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, 1451499 + ... + 1451504.

It is an arithmetic number, because the mean of its divisors is an integer number (2903004).

Almost surely, 2^8709009 is an apocalyptic number.

It is an amenable number.

8709009 is a deficient number, since it is larger than the sum of its proper divisors (2903007).

8709009 is a wasteful number, since it uses less digits than its factorization.

8709009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903006.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 8709009 is about 2951.1030141288. The cubic root of 8709009 is about 205.7419790897.

The spelling of 8709009 in words is "eight million, seven hundred nine thousand, nine".