448197721 has 8 divisors (see below), whose sum is σ = 462905600. Its totient is φ = 433505520.

The previous prime is 448197713. The next prime is 448197727. The reversal of 448197721 is 127791844.

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

It is a cyclic number.

It is not a de Polignac number, because 448197721 - 2³ = 448197713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448197727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91195 + ... + 95983.

It is an arithmetic number, because the mean of its divisors is an integer number (57863200).

Almost surely, 2^448197721 is an apocalyptic number.

It is an amenable number.

448197721 is a deficient number, since it is larger than the sum of its proper divisors (14707879).

448197721 is a wasteful number, since it uses less digits than its factorization.

448197721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839.

The product of its digits is 112896, while the sum is 43.

The square root of 448197721 is about 21170.6806928828. The cubic root of 448197721 is about 765.2850240130.

The spelling of 448197721 in words is "four hundred forty-eight million, one hundred ninety-seven thousand, seven hundred twenty-one".