8687945 has 12 divisors (see below), whose sum is σ = 12128004. Its totient is φ = 5957280.

The previous prime is 8687929. The next prime is 8687953. The reversal of 8687945 is 5497868.

It can be written as a sum of positive squares in 2 ways, for example, as 3286969 + 5400976 = 1813^2 + 2324^2 .

It is not a de Polignac number, because 8687945 - 2⁴ = 8687929 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 8687945.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17486 + ... + 17975.

It is an arithmetic number, because the mean of its divisors is an integer number (1010667).

Almost surely, 2^8687945 is an apocalyptic number.

It is an amenable number.

8687945 is a deficient number, since it is larger than the sum of its proper divisors (3440059).

8687945 is a wasteful number, since it uses less digits than its factorization.

8687945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35480 (or 35473 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 8687945 is about 2947.5320184860. The cubic root of 8687945 is about 205.5759729198.

The spelling of 8687945 in words is "eight million, six hundred eighty-seven thousand, nine hundred forty-five".