8709645 has 32 divisors (see below), whose sum is σ = 16093440. Its totient is φ = 3939840.

The previous prime is 8709611. The next prime is 8709647. The reversal of 8709645 is 5469078.

It is not a de Polignac number, because 8709645 - 2⁹ = 8709133 is a prime.

It is a super-3 number, since 3×8709645³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 8 + 7⁷ + 0 + 9⁵ + 6⁸ + 4¹¹ + 5⁹ .

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 31 ways as a sum of consecutive naturals, for example, 11065 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (502920).

Almost surely, 2^8709645 is an apocalyptic number.

It is an amenable number.

8709645 is a deficient number, since it is larger than the sum of its proper divisors (7383795).

8709645 is a wasteful number, since it uses less digits than its factorization.

8709645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 8709645 is about 2951.2107684813. The cubic root of 8709645 is about 205.7469872644.

The spelling of 8709645 in words is "eight million, seven hundred nine thousand, six hundred forty-five".