11687191 has 2 divisors, whose sum is σ = 11687192. Its totient is φ = 11687190.

The previous prime is 11687131. The next prime is 11687231. The reversal of 11687191 is 19178611.

11687191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11687191 - 2⁷ = 11687063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11687111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5843595 + 5843596.

It is an arithmetic number, because the mean of its divisors is an integer number (5843596).

Almost surely, 2^11687191 is an apocalyptic number.

11687191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11687191 is an equidigital number, since it uses as much as digits as its factorization.

11687191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 34.

The square root of 11687191 is about 3418.6533898598. The cubic root of 11687191 is about 226.9359920963.

The spelling of 11687191 in words is "eleven million, six hundred eighty-seven thousand, one hundred ninety-one".