8000649 has 6 divisors (see below), whose sum is σ = 11556506. Its totient is φ = 5333760.

The previous prime is 8000633. The next prime is 8000651. The reversal of 8000649 is 9460008.

It can be written as a sum of positive squares in only one way, i.e., 7290000 + 710649 = 2700^2 + 843^2 .

It is not a de Polignac number, because 8000649 - 2⁴ = 8000633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8000609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444472 + ... + 444489.

Almost surely, 2^8000649 is an apocalyptic number.

It is an amenable number.

8000649 is a deficient number, since it is larger than the sum of its proper divisors (3555857).

8000649 is a wasteful number, since it uses less digits than its factorization.

8000649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888967 (or 888964 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8000649 is about 2828.5418504947. The cubic root of 8000649 is about 200.0054081871.

It can be divided in two parts, 8000 and 649, that added together give a square (8649 = 93²).

The spelling of 8000649 in words is "eight million, six hundred forty-nine", and thus it is an aban number.