1121443409 has 2 divisors, whose sum is σ = 1121443410. Its totient is φ = 1121443408.

The previous prime is 1121443399. The next prime is 1121443451. The reversal of 1121443409 is 9043441211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 925863184 + 195580225 = 30428^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121443409 - 2⁸ = 1121443153 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 (1121443469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560721704 + 560721705.

It is an arithmetic number, because the mean of its divisors is an integer number (560721705).

Almost surely, 2^1121443409 is an apocalyptic number.

It is an amenable number.

1121443409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121443409 is an equidigital number, since it uses as much as digits as its factorization.

1121443409 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 29.

The square root of 1121443409 is about 33487.9591644519. The cubic root of 1121443409 is about 1038.9447534251.

The spelling of 1121443409 in words is "one billion, one hundred twenty-one million, four hundred forty-three thousand, four hundred nine".