8709649 has 8 divisors (see below), whose sum is σ = 9557352. Its totient is φ = 7887360.

The previous prime is 8709647. The next prime is 8709653. The reversal of 8709649 is 9469078.

8709649 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 48400 + 8661249 = 220^2 + 2943^2 .

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

It is not a de Polignac number, because 8709649 - 2¹ = 8709647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8709647) 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, 5632 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (1194669).

Almost surely, 2^8709649 is an apocalyptic number.

It is an amenable number.

8709649 is a deficient number, since it is larger than the sum of its proper divisors (847703).

8709649 is a wasteful number, since it uses less digits than its factorization.

8709649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12707.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 8709649 is about 2951.2114461692. The cubic root of 8709649 is about 205.7470187615.

The spelling of 8709649 in words is "eight million, seven hundred nine thousand, six hundred forty-nine".