8809649 has 4 divisors (see below), whose sum is σ = 9113460. Its totient is φ = 8505840.

The previous prime is 8809639. The next prime is 8809651. The reversal of 8809649 is 9469088.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4545424 + 4264225 = 2132^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 8809649 - 2⁸ = 8809393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8809639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151862 + ... + 151919.

It is an arithmetic number, because the mean of its divisors is an integer number (2278365).

Almost surely, 2^8809649 is an apocalyptic number.

It is an amenable number.

8809649 is a deficient number, since it is larger than the sum of its proper divisors (303811).

8809649 is a wasteful number, since it uses less digits than its factorization.

8809649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303810.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 8809649 is about 2968.1052878899. The cubic root of 8809649 is about 206.5314536411.

The spelling of 8809649 in words is "eight million, eight hundred nine thousand, six hundred forty-nine".