11111091 has 8 divisors (see below), whose sum is σ = 14830800. Its totient is φ = 7399392.

The previous prime is 11111083. The next prime is 11111099. The reversal of 11111091 is 19011111.

11111091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11111083) and next prime (11111099).

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

It is not a de Polignac number, because 11111091 - 2³ = 11111083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111091.

It is not an unprimeable number, because it can be changed into a prime (11111099) 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, 3085 + ... + 5633.

It is an arithmetic number, because the mean of its divisors is an integer number (1853850).

Almost surely, 2^11111091 is an apocalyptic number.

11111091 is a deficient number, since it is larger than the sum of its proper divisors (3719709).

11111091 is a wasteful number, since it uses less digits than its factorization.

11111091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005.

The product of its (nonzero) digits is 9, while the sum is 15.

The square root of 11111091 is about 3333.3303166653. The cubic root of 11111091 is about 223.1441820636.

The spelling of 11111091 in words is "eleven million, one hundred eleven thousand, ninety-one".