8387649 has 12 divisors (see below), whose sum is σ = 12152400. Its totient is φ = 5574744.

The previous prime is 8387611. The next prime is 8387671. The reversal of 8387649 is 9467838.

It is a happy number.

It is not a de Polignac number, because 8387649 - 2¹² = 8383553 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8387609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2182 + ... + 4640.

It is an arithmetic number, because the mean of its divisors is an integer number (1012700).

Almost surely, 2^8387649 is an apocalyptic number.

It is an amenable number.

8387649 is a deficient number, since it is larger than the sum of its proper divisors (3764751).

8387649 is a wasteful number, since it uses less digits than its factorization.

8387649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844 (or 2841 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 8387649 is about 2896.1438154898. The cubic root of 8387649 is about 203.1795914491.

The spelling of 8387649 in words is "eight million, three hundred eighty-seven thousand, six hundred forty-nine".