449427821 has 4 divisors (see below), whose sum is σ = 449935392. Its totient is φ = 448920252.

The previous prime is 449427763. The next prime is 449427829. The reversal of 449427821 is 128724944.

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 449427821 - 2²⁶ = 382318957 is a prime.

It is a super-3 number, since 3×449427821³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449427829) 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 3 ways as a sum of consecutive naturals, for example, 252455 + ... + 254228.

It is an arithmetic number, because the mean of its divisors is an integer number (112483848).

Almost surely, 2^449427821 is an apocalyptic number.

It is an amenable number.

449427821 is a deficient number, since it is larger than the sum of its proper divisors (507571).

449427821 is an equidigital number, since it uses as much as digits as its factorization.

449427821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507570.

The product of its digits is 129024, while the sum is 41.

The square root of 449427821 is about 21199.7127574880. The cubic root of 449427821 is about 765.9845048869.

The spelling of 449427821 in words is "four hundred forty-nine million, four hundred twenty-seven thousand, eight hundred twenty-one".