8386649 has 4 divisors (see below), whose sum is σ = 8400336. Its totient is φ = 8372964.

The previous prime is 8386639. The next prime is 8386669. The reversal of 8386649 is 9466838.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9466838 = 2 ⋅4733419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8386649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8386639) 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, 5879 + ... + 7164.

It is an arithmetic number, because the mean of its divisors is an integer number (2100084).

Almost surely, 2^8386649 is an apocalyptic number.

It is an amenable number.

8386649 is a deficient number, since it is larger than the sum of its proper divisors (13687).

8386649 is a wasteful number, since it uses less digits than its factorization.

8386649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13686.

The product of its digits is 248832, while the sum is 44.

The square root of 8386649 is about 2895.9711669835. The cubic root of 8386649 is about 203.1715165735.

The spelling of 8386649 in words is "eight million, three hundred eighty-six thousand, six hundred forty-nine".