1108891 has 8 divisors (see below), whose sum is σ = 1276640. Its totient is φ = 943488.

The previous prime is 1108867. The next prime is 1108903. The reversal of 1108891 is 1988011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1108891 - 2¹⁵ = 1076123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1108801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (159580).

2^1108891 is an apocalyptic number.

1108891 is a deficient number, since it is larger than the sum of its proper divisors (167749).

1108891 is a wasteful number, since it uses less digits than its factorization.

1108891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1108891 is about 1053.0389356524. The cubic root of 1108891 is about 103.5053868543.

The spelling of 1108891 in words is "one million, one hundred eight thousand, eight hundred ninety-one".