441345409 has 2 divisors, whose sum is σ = 441345410. Its totient is φ = 441345408.

The previous prime is 441345407. The next prime is 441345439. The reversal of 441345409 is 904543144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436935409 + 4410000 = 20903^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 441345409 - 2¹ = 441345407 is a prime.

Together with 441345407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (441345407) 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, 220672704 + 220672705.

It is an arithmetic number, because the mean of its divisors is an integer number (220672705).

Almost surely, 2^441345409 is an apocalyptic number.

It is an amenable number.

441345409 is a deficient number, since it is larger than the sum of its proper divisors (1).

441345409 is an equidigital number, since it uses as much as digits as its factorization.

441345409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 441345409 is about 21008.2224140930. Note that the first 3 decimals coincide. The cubic root of 441345409 is about 761.3649346208.

The spelling of 441345409 in words is "four hundred forty-one million, three hundred forty-five thousand, four hundred nine".