11491187 has 2 divisors, whose sum is σ = 11491188. Its totient is φ = 11491186.

The previous prime is 11491177. The next prime is 11491199. The reversal of 11491187 is 78119411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11491187 - 2¹⁶ = 11425651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11491177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5745593 + 5745594.

It is an arithmetic number, because the mean of its divisors is an integer number (5745594).

Almost surely, 2^11491187 is an apocalyptic number.

11491187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11491187 is an equidigital number, since it uses as much as digits as its factorization.

11491187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 32.

The square root of 11491187 is about 3389.8653365584. The cubic root of 11491187 is about 225.6601975716.

The spelling of 11491187 in words is "eleven million, four hundred ninety-one thousand, one hundred eighty-seven".