9798891 has 4 divisors (see below), whose sum is σ = 13065192. Its totient is φ = 6532592.

The previous prime is 9798881. The next prime is 9798907. The reversal of 9798891 is 1988979.

9798891 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 9798891 - 2⁶ = 9798827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9798871) 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, 1633146 + ... + 1633151.

It is an arithmetic number, because the mean of its divisors is an integer number (3266298).

Almost surely, 2^9798891 is an apocalyptic number.

9798891 is a deficient number, since it is larger than the sum of its proper divisors (3266301).

9798891 is a wasteful number, since it uses less digits than its factorization.

9798891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266300.

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

The square root of 9798891 is about 3130.3180349607. The cubic root of 9798891 is about 213.9894235900.

It can be divided in two parts, 979 and 8891, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 9798891 in words is "nine million, seven hundred ninety-eight thousand, eight hundred ninety-one".