11440409 has 2 divisors, whose sum is σ = 11440410. Its totient is φ = 11440408.

The previous prime is 11440399. The next prime is 11440417. The reversal of 11440409 is 90404411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8684809 + 2755600 = 2947^2 + 1660^2 .

It is an emirp because it is prime and its reverse (90404411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11440409 - 2⁴ = 11440393 is a prime.

It is equal to p₇₅₃₆₀₂ and since 11440409 and 753602 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 (11440469) 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, 5720204 + 5720205.

It is an arithmetic number, because the mean of its divisors is an integer number (5720205).

Almost surely, 2^11440409 is an apocalyptic number.

It is an amenable number.

11440409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11440409 is an equidigital number, since it uses as much as digits as its factorization.

11440409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 11440409 is about 3382.3673662096. The cubic root of 11440409 is about 225.3273194848.

The spelling of 11440409 in words is "eleven million, four hundred forty thousand, four hundred nine".