8649239 has 2 divisors, whose sum is σ = 8649240. Its totient is φ = 8649238.

The previous prime is 8649227. The next prime is 8649241. The reversal of 8649239 is 9329468.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8649239 is a prime.

Together with 8649241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8649196 and 8649205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8649299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4324619 + 4324620.

It is an arithmetic number, because the mean of its divisors is an integer number (4324620).

Almost surely, 2^8649239 is an apocalyptic number.

8649239 is a deficient number, since it is larger than the sum of its proper divisors (1).

8649239 is an equidigital number, since it uses as much as digits as its factorization.

8649239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 8649239 is about 2940.9588572437. The cubic root of 8649239 is about 205.2702286006.

It can be divided in two parts, 8649 and 239, that added together give a palindrome (8888).

The spelling of 8649239 in words is "eight million, six hundred forty-nine thousand, two hundred thirty-nine".