8638879 has 4 divisors (see below), whose sum is σ = 8654184. Its totient is φ = 8623576.

The previous prime is 8638867. The next prime is 8638891. The reversal of 8638879 is 9788368.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8638867) and next prime (8638891).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8638879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638849) 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 in 3 ways as a sum of consecutive naturals, for example, 6772 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (2163546).

Almost surely, 2^8638879 is an apocalyptic number.

8638879 is a deficient number, since it is larger than the sum of its proper divisors (15305).

8638879 is a wasteful number, since it uses less digits than its factorization.

8638879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15304.

The product of its digits is 580608, while the sum is 49.

The square root of 8638879 is about 2939.1969991819. The cubic root of 8638879 is about 205.1882387589.

The spelling of 8638879 in words is "eight million, six hundred thirty-eight thousand, eight hundred seventy-nine".