449989817 has 4 divisors (see below), whose sum is σ = 450061440. Its totient is φ = 449918196.

The previous prime is 449989763. The next prime is 449989849. The reversal of 449989817 is 718989944.

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 449989817 - 2⁶ = 449989753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449989867) 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, 25373 + ... + 39290.

It is an arithmetic number, because the mean of its divisors is an integer number (112515360).

Almost surely, 2^449989817 is an apocalyptic number.

It is an amenable number.

449989817 is a deficient number, since it is larger than the sum of its proper divisors (71623).

449989817 is an equidigital number, since it uses as much as digits as its factorization.

449989817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71622.

The product of its digits is 5225472, while the sum is 59.

The square root of 449989817 is about 21212.9634186268. The cubic root of 449989817 is about 766.3036521063.

The spelling of 449989817 in words is "four hundred forty-nine million, nine hundred eighty-nine thousand, eight hundred seventeen".