9879421 has 4 divisors (see below), whose sum is σ = 10198144. Its totient is φ = 9560700.

The previous prime is 9879413. The next prime is 9879427. The reversal of 9879421 is 1249789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1249789 = 17 ⋅73517.

It is a cyclic number.

It is not a de Polignac number, because 9879421 - 2³ = 9879413 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 (9879427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159315 + ... + 159376.

It is an arithmetic number, because the mean of its divisors is an integer number (2549536).

Almost surely, 2^9879421 is an apocalyptic number.

It is an amenable number.

9879421 is a deficient number, since it is larger than the sum of its proper divisors (318723).

9879421 is a wasteful number, since it uses less digits than its factorization.

9879421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318722.

The product of its digits is 36288, while the sum is 40.

The square root of 9879421 is about 3143.1546255315. The cubic root of 9879421 is about 214.5740331240.

The spelling of 9879421 in words is "nine million, eight hundred seventy-nine thousand, four hundred twenty-one".