11591549 has 2 divisors, whose sum is σ = 11591550. Its totient is φ = 11591548.

The previous prime is 11591527. The next prime is 11591557. The reversal of 11591549 is 94519511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 268324 = 3365^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 11591549 - 2¹² = 11587453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11591509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5795774 + 5795775.

It is an arithmetic number, because the mean of its divisors is an integer number (5795775).

Almost surely, 2^11591549 is an apocalyptic number.

It is an amenable number.

11591549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11591549 is an equidigital number, since it uses as much as digits as its factorization.

11591549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 35.

The square root of 11591549 is about 3404.6363976202. The cubic root of 11591549 is about 226.3152529956.

The spelling of 11591549 in words is "eleven million, five hundred ninety-one thousand, five hundred forty-nine".