11443409 has 2 divisors, whose sum is σ = 11443410.
Its totient is φ = 11443408.
The previous prime is 11443379. The next prime is 11443441. The reversal of 11443409 is 90434411.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 10240000 + 1203409 = 3200^2 + 1097^2
It is an emirp because it is prime and its reverse (90434411) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 11443409 - 28 = 11443153 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is not a weakly prime, because it can be changed into another prime (11443009) 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, 5721704 + 5721705.
It is an arithmetic number, because the mean of its divisors is an integer number (5721705).
Almost surely, 211443409 is an apocalyptic number.
It is an amenable number.
11443409 is a deficient number, since it is larger than the sum of its proper divisors (1).
11443409 is an equidigital number, since it uses as much as digits as its factorization.
11443409 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 1728, while the sum is 26.
The square root of 11443409 is about 3382.8108135100.
The cubic root of 11443409 is about 225.3470135033.
The spelling of 11443409 in words is "eleven million, four hundred forty-three thousand, four hundred nine".