8649649 has 4 divisors (see below), whose sum is σ = 8686080. Its totient is φ = 8613220.

The previous prime is 8649637. The next prime is 8649661. The reversal of 8649649 is 9469468.

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 an interprime number because it is at equal distance from previous prime (8649637) and next prime (8649661).

It is a cyclic number.

It is not a de Polignac number, because 8649649 - 2⁷ = 8649521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8649599 and 8649608.

It is not an unprimeable number, because it can be changed into a prime (8649629) 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, 17857 + ... + 18334.

It is an arithmetic number, because the mean of its divisors is an integer number (2171520).

Almost surely, 2^8649649 is an apocalyptic number.

It is an amenable number.

8649649 is a deficient number, since it is larger than the sum of its proper divisors (36431).

8649649 is a wasteful number, since it uses less digits than its factorization.

8649649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36430.

The product of its digits is 373248, while the sum is 46.

The square root of 8649649 is about 2941.0285615750. The cubic root of 8649649 is about 205.2734720252.

The spelling of 8649649 in words is "eight million, six hundred forty-nine thousand, six hundred forty-nine".