441745909 has 4 divisors (see below), whose sum is σ = 481904640. Its totient is φ = 401587180.

The previous prime is 441745897. The next prime is 441745943. The reversal of 441745909 is 909547144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 441745909 - 2⁷ = 441745781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441745949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20079349 + ... + 20079370.

It is an arithmetic number, because the mean of its divisors is an integer number (120476160).

Almost surely, 2^441745909 is an apocalyptic number.

It is an amenable number.

441745909 is a deficient number, since it is larger than the sum of its proper divisors (40158731).

441745909 is a wasteful number, since it uses less digits than its factorization.

441745909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40158730.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 441745909 is about 21017.7522347182. The cubic root of 441745909 is about 761.5951658344.

The spelling of 441745909 in words is "four hundred forty-one million, seven hundred forty-five thousand, nine hundred nine".