9798421 has 4 divisors (see below), whose sum is σ = 9807372. Its totient is φ = 9789472.

The previous prime is 9798403. The next prime is 9798457. The reversal of 9798421 is 1248979.

9798421 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 6320196 + 3478225 = 2514^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 9798421 - 2⁷ = 9798293 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9798421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9798461) 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, 2560 + ... + 5113.

It is an arithmetic number, because the mean of its divisors is an integer number (2451843).

Almost surely, 2^9798421 is an apocalyptic number.

It is an amenable number.

9798421 is a deficient number, since it is larger than the sum of its proper divisors (8951).

9798421 is a wasteful number, since it uses less digits than its factorization.

9798421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8950.

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

The square root of 9798421 is about 3130.2429618162. The cubic root of 9798421 is about 213.9860022288.

The spelling of 9798421 in words is "nine million, seven hundred ninety-eight thousand, four hundred twenty-one".