9898791 has 16 divisors (see below), whose sum is σ = 15878400. Its totient is φ = 5358528.

The previous prime is 9898783. The next prime is 9898793. The reversal of 9898791 is 1978989.

9898791 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9898791 - 2³ = 9898783 is a prime.

9898791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12006 + ... + 12803.

It is an arithmetic number, because the mean of its divisors is an integer number (992400).

Almost surely, 2^9898791 is an apocalyptic number.

9898791 is a deficient number, since it is larger than the sum of its proper divisors (5979609).

9898791 is a wasteful number, since it uses less digits than its factorization.

9898791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24838.

The product of its digits is 326592, while the sum is 51.

The square root of 9898791 is about 3146.2344159328. The cubic root of 9898791 is about 214.7141758051.

It can be divided in two parts, 98 and 98791, that added together give a palindrome (98889).

The spelling of 9898791 in words is "nine million, eight hundred ninety-eight thousand, seven hundred ninety-one".