8008645 has 4 divisors (see below), whose sum is σ = 9610380. Its totient is φ = 6406912.

The previous prime is 8008643. The next prime is 8008667. The reversal of 8008645 is 5468008.

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 5377761 + 2630884 = 2319^2 + 1622^2 .

It is a cyclic number.

It is not a de Polignac number, because 8008645 - 2¹ = 8008643 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8008643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800860 + ... + 800869.

It is an arithmetic number, because the mean of its divisors is an integer number (2402595).

Almost surely, 2^8008645 is an apocalyptic number.

It is an amenable number.

8008645 is a deficient number, since it is larger than the sum of its proper divisors (1601735).

8008645 is a wasteful number, since it uses less digits than its factorization.

8008645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601734.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 8008645 is about 2829.9549466378. The cubic root of 8008645 is about 200.0720157322.

The spelling of 8008645 in words is "eight million, eight thousand, six hundred forty-five".