8639965 has 8 divisors (see below), whose sum is σ = 10913760. Its totient is φ = 6548112.

The previous prime is 8639951. The next prime is 8639977. The reversal of 8639965 is 5699368.

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

It is a cyclic number.

It is not a de Polignac number, because 8639965 - 2⁷ = 8639837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45379 + ... + 45568.

It is an arithmetic number, because the mean of its divisors is an integer number (1364220).

Almost surely, 2^8639965 is an apocalyptic number.

It is an amenable number.

8639965 is a deficient number, since it is larger than the sum of its proper divisors (2273795).

8639965 is a wasteful number, since it uses less digits than its factorization.

8639965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90971.

The product of its digits is 349920, while the sum is 46.

The square root of 8639965 is about 2939.3817377129. The cubic root of 8639965 is about 205.1968365214.

It can be divided in two parts, 8639 and 965, that added together give a square (9604 = 98²).

The spelling of 8639965 in words is "eight million, six hundred thirty-nine thousand, nine hundred sixty-five".