9798922421 has 4 divisors (see below), whose sum is σ = 10314655200. Its totient is φ = 9283189644.

The previous prime is 9798922373. The next prime is 9798922423. The reversal of 9798922421 is 1242298979.

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: 1242298979 = 4111 ⋅302189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9798922421 is a prime.

It is a super-2 number, since 2×9798922421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9798922423) 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, 257866361 + ... + 257866398.

It is an arithmetic number, because the mean of its divisors is an integer number (2578663800).

Almost surely, 2^9798922421 is an apocalyptic number.

It is an amenable number.

9798922421 is a deficient number, since it is larger than the sum of its proper divisors (515732779).

9798922421 is a wasteful number, since it uses less digits than its factorization.

9798922421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515732778.

The product of its digits is 1306368, while the sum is 53.

The square root of 9798922421 is about 98989.5066206515. The cubic root of 9798922421 is about 2139.8965231504.

The spelling of 9798922421 in words is "nine billion, seven hundred ninety-eight million, nine hundred twenty-two thousand, four hundred twenty-one".