9873421 has 4 divisors (see below), whose sum is σ = 9882844. Its totient is φ = 9864000.

The previous prime is 9873389. The next prime is 9873433. The reversal of 9873421 is 1243789.

9873421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3944196 + 5929225 = 1986^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 9873421 - 2⁵ = 9873389 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 (9873121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910 + ... + 5311.

It is an arithmetic number, because the mean of its divisors is an integer number (2470711).

Almost surely, 2^9873421 is an apocalyptic number.

It is an amenable number.

9873421 is a deficient number, since it is larger than the sum of its proper divisors (9423).

9873421 is a wasteful number, since it uses less digits than its factorization.

9873421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9422.

The product of its digits is 12096, while the sum is 34.

The square root of 9873421 is about 3142.2000254599. The cubic root of 9873421 is about 214.5305857426.

The spelling of 9873421 in words is "nine million, eight hundred seventy-three thousand, four hundred twenty-one".