8517649 has 4 divisors (see below), whose sum is σ = 9734464. Its totient is φ = 7300836.

The previous prime is 8517631. The next prime is 8517661. The reversal of 8517649 is 9467158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8517649 - 2⁵ = 8517617 is a prime.

It is a Duffinian number.

8517649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8517049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608397 + ... + 608410.

It is an arithmetic number, because the mean of its divisors is an integer number (2433616).

Almost surely, 2^8517649 is an apocalyptic number.

It is an amenable number.

8517649 is a deficient number, since it is larger than the sum of its proper divisors (1216815).

8517649 is a wasteful number, since it uses less digits than its factorization.

8517649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216814.

The product of its digits is 60480, while the sum is 40.

The square root of 8517649 is about 2918.5011564157. The cubic root of 8517649 is about 204.2239067236.

The spelling of 8517649 in words is "eight million, five hundred seventeen thousand, six hundred forty-nine".