449879665 has 4 divisors (see below), whose sum is σ = 539855604. Its totient is φ = 359903728.

The previous prime is 449879659. The next prime is 449879669. The reversal of 449879665 is 566978944.

It is a happy number.

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 279524961 + 170354704 = 16719^2 + 13052^2 .

It is a cyclic number.

It is not a de Polignac number, because 449879665 - 2⁹ = 449879153 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449879669) 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, 44987962 + ... + 44987971.

It is an arithmetic number, because the mean of its divisors is an integer number (134963901).

Almost surely, 2^449879665 is an apocalyptic number.

It is an amenable number.

449879665 is a deficient number, since it is larger than the sum of its proper divisors (89975939).

449879665 is an equidigital number, since it uses as much as digits as its factorization.

449879665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89975938.

The product of its digits is 13063680, while the sum is 58.

The square root of 449879665 is about 21210.3669228045. The cubic root of 449879665 is about 766.2411197517.

The spelling of 449879665 in words is "four hundred forty-nine million, eight hundred seventy-nine thousand, six hundred sixty-five".