11648209 has 2 divisors, whose sum is σ = 11648210. Its totient is φ = 11648208.

The previous prime is 11648201. The next prime is 11648237. The reversal of 11648209 is 90284611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 88209 = 3400^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 11648209 - 2³ = 11648201 is a prime.

It is a Chen prime.

It is equal to p₇₆₆₄₄₄ and since 11648209 and 766444 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11648201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5824104 + 5824105.

It is an arithmetic number, because the mean of its divisors is an integer number (5824105).

Almost surely, 2^11648209 is an apocalyptic number.

It is an amenable number.

11648209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11648209 is an equidigital number, since it uses as much as digits as its factorization.

11648209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 11648209 is about 3412.9472600672. The cubic root of 11648209 is about 226.6834001007.

The spelling of 11648209 in words is "eleven million, six hundred forty-eight thousand, two hundred nine".