9928598209 has 4 divisors (see below), whose sum is σ = 10360276416. Its totient is φ = 9496920004.

The previous prime is 9928598177. The next prime is 9928598227. The reversal of 9928598209 is 9028958299.

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.

It is a cyclic number.

It is not a de Polignac number, because 9928598209 - 2⁵ = 9928598177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9928598299) 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, 215839069 + ... + 215839114.

It is an arithmetic number, because the mean of its divisors is an integer number (2590069104).

Almost surely, 2^9928598209 is an apocalyptic number.

It is an amenable number.

9928598209 is a deficient number, since it is larger than the sum of its proper divisors (431678207).

9928598209 is a wasteful number, since it uses less digits than its factorization.

9928598209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431678206.

The product of its (nonzero) digits is 8398080, while the sum is 61.

The square root of 9928598209 is about 99642.3514826903. The cubic root of 9928598209 is about 2149.2947540149.

The spelling of 9928598209 in words is "nine billion, nine hundred twenty-eight million, five hundred ninety-eight thousand, two hundred nine".