449999999 has 4 divisors (see below), whose sum is σ = 464516160. Its totient is φ = 435483840.

The previous prime is 449999993. The next prime is 450000007. The reversal of 449999999 is 999999944.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 449999999 - 2²⁰ = 448951423 is a prime.

It is a Duffinian number.

449999999 is a modest number, since divided by 99999 gives 4499 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449999993) 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, 7258034 + ... + 7258095.

It is an arithmetic number, because the mean of its divisors is an integer number (116129040).

Almost surely, 2^449999999 is an apocalyptic number.

449999999 is a deficient number, since it is larger than the sum of its proper divisors (14516161).

449999999 is a wasteful number, since it uses less digits than its factorization.

449999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14516160.

The product of its digits is 76527504, while the sum is 71.

The square root of 449999999 is about 21213.2034120262. The cubic root of 449999999 is about 766.3094318259.

Subtracting 449999999 from its reverse (999999944), we obtain a palindrome (549999945).

The spelling of 449999999 in words is "four hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".