8639243 has 8 divisors (see below), whose sum is σ = 9139200. Its totient is φ = 8143848.

The previous prime is 8639227. The next prime is 8639249. The reversal of 8639243 is 3429368.

It is a happy number.

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 8639243 - 2⁴ = 8639227 is a prime.

It is a super-2 number, since 2×8639243² = 149273039226098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8639249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3218 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (1142400).

Almost surely, 2^8639243 is an apocalyptic number.

8639243 is a deficient number, since it is larger than the sum of its proper divisors (499957).

8639243 is a wasteful number, since it uses less digits than its factorization.

8639243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281.

The product of its digits is 31104, while the sum is 35.

The square root of 8639243 is about 2939.2589202042. The cubic root of 8639243 is about 205.1911205938.

The spelling of 8639243 in words is "eight million, six hundred thirty-nine thousand, two hundred forty-three".