449989819 has 4 divisors (see below), whose sum is σ = 462151744. Its totient is φ = 437827896.

The previous prime is 449989763. The next prime is 449989849. The reversal of 449989819 is 918989944.

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 449989819 - 2¹¹ = 449987771 is a prime.

It is a super-2 number, since 2×449989819² = 404981674407305522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449989849) 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, 6080907 + ... + 6080980.

It is an arithmetic number, because the mean of its divisors is an integer number (115537936).

Almost surely, 2^449989819 is an apocalyptic number.

449989819 is a deficient number, since it is larger than the sum of its proper divisors (12161925).

449989819 is a wasteful number, since it uses less digits than its factorization.

449989819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12161924.

The product of its digits is 6718464, while the sum is 61.

The square root of 449989819 is about 21212.9634657678. The cubic root of 449989819 is about 766.3036532416.

The spelling of 449989819 in words is "four hundred forty-nine million, nine hundred eighty-nine thousand, eight hundred nineteen".