441865681 has 4 divisors (see below), whose sum is σ = 444108852. Its totient is φ = 439622512.

The previous prime is 441865679. The next prime is 441865693. The reversal of 441865681 is 186568144.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 431974656 + 9891025 = 20784^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 441865681 - 2¹ = 441865679 is a prime.

It is a super-2 number, since 2×441865681² = 390490560091187522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441865601) 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, 1121290 + ... + 1121683.

It is an arithmetic number, because the mean of its divisors is an integer number (111027213).

Almost surely, 2^441865681 is an apocalyptic number.

It is an amenable number.

441865681 is a deficient number, since it is larger than the sum of its proper divisors (2243171).

441865681 is a wasteful number, since it uses less digits than its factorization.

441865681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243170.

The product of its digits is 184320, while the sum is 43.

The square root of 441865681 is about 21020.6013472498. The cubic root of 441865681 is about 761.6639908697.

The spelling of 441865681 in words is "four hundred forty-one million, eight hundred sixty-five thousand, six hundred eighty-one".