115111091 has 4 divisors (see below), whose sum is σ = 118824384. Its totient is φ = 111397800.

The previous prime is 115111069. The next prime is 115111103. The reversal of 115111091 is 190111511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115111091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115111391) 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, 1856600 + ... + 1856661.

It is an arithmetic number, because the mean of its divisors is an integer number (29706096).

Almost surely, 2^115111091 is an apocalyptic number.

115111091 is a deficient number, since it is larger than the sum of its proper divisors (3713293).

115111091 is an equidigital number, since it uses as much as digits as its factorization.

115111091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713292.

The product of its (nonzero) digits is 45, while the sum is 20.

The square root of 115111091 is about 10728.9836890546. The cubic root of 115111091 is about 486.4509509252.

The spelling of 115111091 in words is "one hundred fifteen million, one hundred eleven thousand, ninety-one".