449211909 has 4 divisors (see below), whose sum is σ = 598949216. Its totient is φ = 299474604.

The previous prime is 449211907. The next prime is 449211923. The reversal of 449211909 is 909112944.

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 not a de Polignac number, because 449211909 - 2¹ = 449211907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449211907) 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, 74868649 + ... + 74868654.

It is an arithmetic number, because the mean of its divisors is an integer number (149737304).

Almost surely, 2^449211909 is an apocalyptic number.

It is an amenable number.

449211909 is a deficient number, since it is larger than the sum of its proper divisors (149737307).

449211909 is a wasteful number, since it uses less digits than its factorization.

449211909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149737306.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 449211909 is about 21194.6198125845. The cubic root of 449211909 is about 765.8618216808.

The spelling of 449211909 in words is "four hundred forty-nine million, two hundred eleven thousand, nine hundred nine".