449968609 has 4 divisors (see below), whose sum is σ = 450406080. Its totient is φ = 449531140.

The previous prime is 449968591. The next prime is 449968639. The reversal of 449968609 is 906869944.

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 449968609 - 2¹³ = 449960417 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 449968609.

It is not an unprimeable number, because it can be changed into a prime (449968639) 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, 217189 + ... + 219250.

It is an arithmetic number, because the mean of its divisors is an integer number (112601520).

Almost surely, 2^449968609 is an apocalyptic number.

It is an amenable number.

449968609 is a deficient number, since it is larger than the sum of its proper divisors (437471).

449968609 is a wasteful number, since it uses less digits than its factorization.

449968609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437470.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The square root of 449968609 is about 21212.4635297270. The cubic root of 449968609 is about 766.2916132982.

The spelling of 449968609 in words is "four hundred forty-nine million, nine hundred sixty-eight thousand, six hundred nine".