8642879 has 8 divisors (see below), whose sum is σ = 9989280. Its totient is φ = 7324416.

The previous prime is 8642863. The next prime is 8642897. The reversal of 8642879 is 9782468.

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 8642879 - 2⁴ = 8642863 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642819) 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 7 ways as a sum of consecutive naturals, for example, 6314 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (1248660).

Almost surely, 2^8642879 is an apocalyptic number.

8642879 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8642879 is a deficient number, since it is larger than the sum of its proper divisors (1346401).

8642879 is a wasteful number, since it uses less digits than its factorization.

8642879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13969.

The product of its digits is 193536, while the sum is 44.

The square root of 8642879 is about 2939.8773783952. The cubic root of 8642879 is about 205.2199028329.

The spelling of 8642879 in words is "eight million, six hundred forty-two thousand, eight hundred seventy-nine".