449821609 has 4 divisors (see below), whose sum is σ = 449894016. Its totient is φ = 449749204.

The previous prime is 449821607. The next prime is 449821633. The reversal of 449821609 is 906128944.

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 449821609 - 2¹ = 449821607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449821607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25909 + ... + 39634.

It is an arithmetic number, because the mean of its divisors is an integer number (112473504).

Almost surely, 2^449821609 is an apocalyptic number.

It is an amenable number.

449821609 is a deficient number, since it is larger than the sum of its proper divisors (72407).

449821609 is an equidigital number, since it uses as much as digits as its factorization.

449821609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72406.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 449821609 is about 21208.9983026073. The cubic root of 449821609 is about 766.2081577461.

The spelling of 449821609 in words is "four hundred forty-nine million, eight hundred twenty-one thousand, six hundred nine".