8918649 has 6 divisors (see below), whose sum is σ = 12882506. Its totient is φ = 5945760.

The previous prime is 8918639. The next prime is 8918653. The reversal of 8918649 is 9468198.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 186624 = 2955^2 + 432^2 .

It is not a de Polignac number, because 8918649 - 2⁷ = 8918521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8918639) 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, 495472 + ... + 495489.

Almost surely, 2^8918649 is an apocalyptic number.

It is an amenable number.

8918649 is a deficient number, since it is larger than the sum of its proper divisors (3963857).

8918649 is a wasteful number, since it uses less digits than its factorization.

8918649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990967 (or 990964 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 8918649 is about 2986.4107219202. The cubic root of 8918649 is about 207.3797551739.

The spelling of 8918649 in words is "eight million, nine hundred eighteen thousand, six hundred forty-nine".