11055509 has 2 divisors, whose sum is σ = 11055510. Its totient is φ = 11055508.

The previous prime is 11055493. The next prime is 11055523. The reversal of 11055509 is 90555011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9591409 + 1464100 = 3097^2 + 1210^2 .

It is an emirp because it is prime and its reverse (90555011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11055509 - 2⁴ = 11055493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11055529) 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, 5527754 + 5527755.

It is an arithmetic number, because the mean of its divisors is an integer number (5527755).

Almost surely, 2^11055509 is an apocalyptic number.

It is an amenable number.

11055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11055509 is an equidigital number, since it uses as much as digits as its factorization.

11055509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 11055509 is about 3324.9825563452. The cubic root of 11055509 is about 222.7714752248.

The spelling of 11055509 in words is "eleven million, fifty-five thousand, five hundred nine".