8398649 has 6 divisors (see below), whose sum is σ = 9769914. Its totient is φ = 7198800.

The previous prime is 8398633. The next prime is 8398673. The reversal of 8398649 is 9468938.

It can be written as a sum of positive squares in only one way, i.e., 7645225 + 753424 = 2765^2 + 868^2 .

It is not a de Polignac number, because 8398649 - 2⁴ = 8398633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8398619) 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, 85652 + ... + 85749.

It is an arithmetic number, because the mean of its divisors is an integer number (1628319).

Almost surely, 2^8398649 is an apocalyptic number.

It is an amenable number.

8398649 is a deficient number, since it is larger than the sum of its proper divisors (1371265).

8398649 is a wasteful number, since it uses less digits than its factorization.

8398649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171415 (or 171408 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 8398649 is about 2898.0422702231. The cubic root of 8398649 is about 203.2683727511.

The spelling of 8398649 in words is "eight million, three hundred ninety-eight thousand, six hundred forty-nine".