441661809 has 8 divisors (see below), whose sum is σ = 589663360. Its totient is φ = 294050736.

The previous prime is 441661807. The next prime is 441661811. The reversal of 441661809 is 908166144.

It is an interprime number because it is at equal distance from previous prime (441661807) and next prime (441661811).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 441661809 - 2¹ = 441661807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441661807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94969 + ... + 99510.

It is an arithmetic number, because the mean of its divisors is an integer number (73707920).

Almost surely, 2^441661809 is an apocalyptic number.

It is an amenable number.

441661809 is a deficient number, since it is larger than the sum of its proper divisors (148001551).

441661809 is a wasteful number, since it uses less digits than its factorization.

441661809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195239.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 441661809 is about 21015.7514498055. The cubic root of 441661809 is about 761.5468316999.

The spelling of 441661809 in words is "four hundred forty-one million, six hundred sixty-one thousand, eight hundred nine".