111841091 has 4 divisors (see below), whose sum is σ = 112239384. Its totient is φ = 111442800.

The previous prime is 111841073. The next prime is 111841099. The reversal of 111841091 is 190148111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190148111 = 17 ⋅11185183.

It is a cyclic number.

It is not a de Polignac number, because 111841091 - 2¹⁸ = 111578947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111841091.

It is not an unprimeable number, because it can be changed into a prime (111841099) 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, 198725 + ... + 199286.

It is an arithmetic number, because the mean of its divisors is an integer number (28059846).

Almost surely, 2^111841091 is an apocalyptic number.

111841091 is a deficient number, since it is larger than the sum of its proper divisors (398293).

111841091 is an equidigital number, since it uses as much as digits as its factorization.

111841091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398292.

The product of its (nonzero) digits is 288, while the sum is 26.

The square root of 111841091 is about 10575.4948347583. The cubic root of 111841091 is about 481.8003727314.

The spelling of 111841091 in words is "one hundred eleven million, eight hundred forty-one thousand, ninety-one".