1181410091 has 4 divisors (see below), whose sum is σ = 1222148400. Its totient is φ = 1140671784.

The previous prime is 1181410073. The next prime is 1181410117. The reversal of 1181410091 is 1900141811.

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-1181410091 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 1181410091.

It is not an unprimeable number, because it can be changed into a prime (1181410051) 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, 20369111 + ... + 20369168.

It is an arithmetic number, because the mean of its divisors is an integer number (305537100).

Almost surely, 2^1181410091 is an apocalyptic number.

1181410091 is a deficient number, since it is larger than the sum of its proper divisors (40738309).

1181410091 is an equidigital number, since it uses as much as digits as its factorization.

1181410091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40738308.

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

The square root of 1181410091 is about 34371.6466146154. The cubic root of 1181410091 is about 1057.1425625351.

The spelling of 1181410091 in words is "one billion, one hundred eighty-one million, four hundred ten thousand, ninety-one".