8421879 has 8 divisors (see below), whose sum is σ = 11286400. Its totient is φ = 5585976.

The previous prime is 8421877. The next prime is 8421901. The reversal of 8421879 is 9781248.

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

It is not a de Polignac number, because 8421879 - 2¹ = 8421877 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 (8421877) 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, 6457 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (1410800).

Almost surely, 2^8421879 is an apocalyptic number.

8421879 is a deficient number, since it is larger than the sum of its proper divisors (2864521).

8421879 is a wasteful number, since it uses less digits than its factorization.

8421879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14309.

The product of its digits is 32256, while the sum is 39.

The square root of 8421879 is about 2902.0473807297. The cubic root of 8421879 is about 203.4556083206.

The spelling of 8421879 in words is "eight million, four hundred twenty-one thousand, eight hundred seventy-nine".