449386661 has 4 divisors (see below), whose sum is σ = 449440524. Its totient is φ = 449332800.

The previous prime is 449386607. The next prime is 449386733. The reversal of 449386661 is 166683944.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 139098436 + 310288225 = 11794^2 + 17615^2 .

It is a cyclic number.

It is not a de Polignac number, because 449386661 - 2¹⁴ = 449370277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449386061) 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, 11450 + ... + 32091.

It is an arithmetic number, because the mean of its divisors is an integer number (112360131).

Almost surely, 2^449386661 is an apocalyptic number.

It is an amenable number.

449386661 is a deficient number, since it is larger than the sum of its proper divisors (53863).

449386661 is a wasteful number, since it uses less digits than its factorization.

449386661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53862.

The product of its digits is 746496, while the sum is 47.

The square root of 449386661 is about 21198.7419673904. The cubic root of 449386661 is about 765.9611204239.

The spelling of 449386661 in words is "four hundred forty-nine million, three hundred eighty-six thousand, six hundred sixty-one".