9440421409 has 2 divisors, whose sum is σ = 9440421410. Its totient is φ = 9440421408.

The previous prime is 9440421379. The next prime is 9440421433. The reversal of 9440421409 is 9041240449.

9440421409 is digitally balanced in base 3, 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., 9322481809 + 117939600 = 96553^2 + 10860^2 .

It is an emirp because it is prime and its reverse (9041240449) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9440421409 - 2⁷ = 9440421281 is a prime.

It is not a weakly prime, because it can be changed into another prime (9440421449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4720210704 + 4720210705.

It is an arithmetic number, because the mean of its divisors is an integer number (4720210705).

Almost surely, 2^9440421409 is an apocalyptic number.

It is an amenable number.

9440421409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9440421409 is an equidigital number, since it uses as much as digits as its factorization.

9440421409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 9440421409 is about 97161.8310294737. The cubic root of 9440421409 is about 2113.4750586427.

The spelling of 9440421409 in words is "nine billion, four hundred forty million, four hundred twenty-one thousand, four hundred nine".