9898508921 has 8 divisors (see below), whose sum is σ = 11313216384. Its totient is φ = 8483960160.

The previous prime is 9898508911. The next prime is 9898508941. The reversal of 9898508921 is 1298058989.

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

It is a cyclic number.

It is not a de Polignac number, because 9898508921 - 2¹⁴ = 9898492537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9898508911) 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, 163061 + ... + 215373.

It is an arithmetic number, because the mean of its divisors is an integer number (1414152048).

Almost surely, 2^9898508921 is an apocalyptic number.

It is an amenable number.

9898508921 is a deficient number, since it is larger than the sum of its proper divisors (1414707463).

9898508921 is a wasteful number, since it uses less digits than its factorization.

9898508921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79351.

The product of its (nonzero) digits is 3732480, while the sum is 59.

The square root of 9898508921 is about 99491.2504746020. The cubic root of 9898508921 is about 2147.1213626528.

The spelling of 9898508921 in words is "nine billion, eight hundred ninety-eight million, five hundred eight thousand, nine hundred twenty-one".