8649549 has 12 divisors (see below), whose sum is σ = 13228956. Its totient is φ = 5427072.

The previous prime is 8649533. The next prime is 8649581. The reversal of 8649549 is 9459468.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2975625 + 5673924 = 1725^2 + 2382^2 .

It is not a de Polignac number, because 8649549 - 2⁴ = 8649533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649049) 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, 28114 + ... + 28419.

It is an arithmetic number, because the mean of its divisors is an integer number (1102413).

Almost surely, 2^8649549 is an apocalyptic number.

It is an amenable number.

8649549 is a deficient number, since it is larger than the sum of its proper divisors (4579407).

8649549 is a wasteful number, since it uses less digits than its factorization.

8649549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56556 (or 56553 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 8649549 is about 2941.0115606709. The cubic root of 8649549 is about 205.2726809555.

The spelling of 8649549 in words is "eight million, six hundred forty-nine thousand, five hundred forty-nine".