11648509 has 2 divisors, whose sum is σ = 11648510. Its totient is φ = 11648508.

The previous prime is 11648491. The next prime is 11648513. The reversal of 11648509 is 90584611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 108900 = 3397^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 11648509 - 2⁵ = 11648477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11648209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5824254 + 5824255.

It is an arithmetic number, because the mean of its divisors is an integer number (5824255).

Almost surely, 2^11648509 is an apocalyptic number.

It is an amenable number.

11648509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11648509 is an equidigital number, since it uses as much as digits as its factorization.

11648509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 11648509 is about 3412.9912100678. The cubic root of 11648509 is about 226.6853461634.

The spelling of 11648509 in words is "eleven million, six hundred forty-eight thousand, five hundred nine".