8645645 has 4 divisors (see below), whose sum is σ = 10374780. Its totient is φ = 6916512.

The previous prime is 8645633. The next prime is 8645647. The reversal of 8645645 is 5465468.

8645645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1350244 + 7295401 = 1162^2 + 2701^2 .

It is a cyclic number.

It is not a de Polignac number, because 8645645 - 2²⁰ = 7597069 is a prime.

It is a super-3 number, since 3×8645645³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8645599 and 8645608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8645647) 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 3 ways as a sum of consecutive naturals, for example, 864560 + ... + 864569.

It is an arithmetic number, because the mean of its divisors is an integer number (2593695).

Almost surely, 2^8645645 is an apocalyptic number.

It is an amenable number.

8645645 is a deficient number, since it is larger than the sum of its proper divisors (1729135).

8645645 is a wasteful number, since it uses less digits than its factorization.

8645645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729134.

The product of its digits is 115200, while the sum is 38.

The square root of 8645645 is about 2940.3477685471. The cubic root of 8645645 is about 205.2417928268.

The spelling of 8645645 in words is "eight million, six hundred forty-five thousand, six hundred forty-five".