8616639 has 8 divisors (see below), whose sum is σ = 11531440. Its totient is φ = 5723136.

The previous prime is 8616599. The next prime is 8616653. The reversal of 8616639 is 9366168.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8616639 - 2¹⁵ = 8583871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8616597 and 8616606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8616679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4354 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (1441430).

Almost surely, 2^8616639 is an apocalyptic number.

8616639 is a deficient number, since it is larger than the sum of its proper divisors (2914801).

8616639 is a wasteful number, since it uses less digits than its factorization.

8616639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10649.

The product of its digits is 46656, while the sum is 39.

The square root of 8616639 is about 2935.4112148045. The cubic root of 8616639 is about 205.0120080216.

The spelling of 8616639 in words is "eight million, six hundred sixteen thousand, six hundred thirty-nine".