9801111 has 4 divisors (see below), whose sum is σ = 13068152. Its totient is φ = 6534072.

The previous prime is 9801109. The next prime is 9801133. The reversal of 9801111 is 1111089.

9801111 is digitally balanced in base 3, 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 not a de Polignac number, because 9801111 - 2¹ = 9801109 is a prime.

It is a Duffinian number.

9801111 is a modest number, since divided by 1111 gives 980 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633516 + ... + 1633521.

It is an arithmetic number, because the mean of its divisors is an integer number (3267038).

Almost surely, 2^9801111 is an apocalyptic number.

9801111 is a deficient number, since it is larger than the sum of its proper divisors (3267041).

9801111 is a wasteful number, since it uses less digits than its factorization.

9801111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267040.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 9801111 is about 3130.6726114367. The cubic root of 9801111 is about 214.0055825836.

The spelling of 9801111 in words is "nine million, eight hundred one thousand, one hundred eleven".