449404561 has 4 divisors (see below), whose sum is σ = 464901300. Its totient is φ = 433907824.

The previous prime is 449404559. The next prime is 449404573. The reversal of 449404561 is 165404944.

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 94458961 + 354945600 = 9719^2 + 18840^2 .

It is a cyclic number.

It is not a de Polignac number, because 449404561 - 2¹ = 449404559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 449404561.

It is not an unprimeable number, because it can be changed into a prime (449404591) 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, 7748326 + ... + 7748383.

It is an arithmetic number, because the mean of its divisors is an integer number (116225325).

Almost surely, 2^449404561 is an apocalyptic number.

It is an amenable number.

449404561 is a deficient number, since it is larger than the sum of its proper divisors (15496739).

449404561 is a wasteful number, since it uses less digits than its factorization.

449404561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15496738.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 449404561 is about 21199.1641580511. The cubic root of 449404561 is about 765.9712902273.

The spelling of 449404561 in words is "four hundred forty-nine million, four hundred four thousand, five hundred sixty-one".