11428409 has 2 divisors, whose sum is σ = 11428410. Its totient is φ = 11428408.

The previous prime is 11428363. The next prime is 11428421. The reversal of 11428409 is 90482411.

11428409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 846400 = 3253^2 + 920^2 .

It is an emirp because it is prime and its reverse (90482411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11428409 - 2¹² = 11424313 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 (11428489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714204 + 5714205.

It is an arithmetic number, because the mean of its divisors is an integer number (5714205).

Almost surely, 2^11428409 is an apocalyptic number.

It is an amenable number.

11428409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428409 is an equidigital number, since it uses as much as digits as its factorization.

11428409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 11428409 is about 3380.5929953190. The cubic root of 11428409 is about 225.2485089638.

The spelling of 11428409 in words is "eleven million, four hundred twenty-eight thousand, four hundred nine".