11388449 has 2 divisors, whose sum is σ = 11388450. Its totient is φ = 11388448.

The previous prime is 11388437. The next prime is 11388451. The reversal of 11388449 is 94488311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 286225 = 3332^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11388449 is a prime.

It is a Sophie Germain prime.

Together with 11388451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11384449) 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, 5694224 + 5694225.

It is an arithmetic number, because the mean of its divisors is an integer number (5694225).

Almost surely, 2^11388449 is an apocalyptic number.

It is an amenable number.

11388449 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388449 is an equidigital number, since it uses as much as digits as its factorization.

11388449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 11388449 is about 3374.6776142322. The cubic root of 11388449 is about 224.9856715155.

The spelling of 11388449 in words is "eleven million, three hundred eighty-eight thousand, four hundred forty-nine".