11587091 has 2 divisors, whose sum is σ = 11587092. Its totient is φ = 11587090.

The previous prime is 11587073. The next prime is 11587111. The reversal of 11587091 is 19078511.

It is a weak prime.

It is an emirp because it is prime and its reverse (19078511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11587091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11587391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5793545 + 5793546.

It is an arithmetic number, because the mean of its divisors is an integer number (5793546).

Almost surely, 2^11587091 is an apocalyptic number.

11587091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11587091 is an equidigital number, since it uses as much as digits as its factorization.

11587091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 11587091 is about 3403.9816391984. The cubic root of 11587091 is about 226.2862363742.

It can be divided in two parts, 1158 and 7091, that multiplied together give a triangular number (8211378 = T₄₀₅₂).

The spelling of 11587091 in words is "eleven million, five hundred eighty-seven thousand, ninety-one".