111111398 has 16 divisors (see below), whose sum is σ = 170848656. Its totient is φ = 54166560.

The previous prime is 111111397. The next prime is 111111421. The reversal of 111111398 is 893111111.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80240 + ... + 81612.

It is an arithmetic number, because the mean of its divisors is an integer number (10678041).

Almost surely, 2^111111398 is an apocalyptic number.

111111398 is a deficient number, since it is larger than the sum of its proper divisors (59737258).

111111398 is a wasteful number, since it uses less digits than its factorization.

111111398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359.

The product of its digits is 216, while the sum is 26.

The square root of 111111398 is about 10540.9391422207. The cubic root of 111111398 is about 480.7502705342.

The spelling of 111111398 in words is "one hundred eleven million, one hundred eleven thousand, three hundred ninety-eight".