448661009 has 4 divisors (see below), whose sum is σ = 448763940. Its totient is φ = 448558080.

The previous prime is 448660981. The next prime is 448661029. The reversal of 448661009 is 900166844.

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 329785600 + 118875409 = 18160^2 + 10903^2 .

It is a cyclic number.

It is not a de Polignac number, because 448661009 - 2²⁸ = 180225553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448661029) 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 in 3 ways as a sum of consecutive naturals, for example, 44624 + ... + 53745.

It is an arithmetic number, because the mean of its divisors is an integer number (112190985).

Almost surely, 2^448661009 is an apocalyptic number.

It is an amenable number.

448661009 is a deficient number, since it is larger than the sum of its proper divisors (102931).

448661009 is an equidigital number, since it uses as much as digits as its factorization.

448661009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102930.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 448661009 is about 21181.6196028538. The cubic root of 448661009 is about 765.5486169618.

The spelling of 448661009 in words is "four hundred forty-eight million, six hundred sixty-one thousand, nine".