449167821 has 8 divisors (see below), whose sum is σ = 598994304. Its totient is φ = 299393280.

The previous prime is 449167819. The next prime is 449167837. The reversal of 449167821 is 128761944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 449167821 - 2¹ = 449167819 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449167021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17260 + ... + 34586.

It is an arithmetic number, because the mean of its divisors is an integer number (74874288).

Almost surely, 2^449167821 is an apocalyptic number.

It is an amenable number.

449167821 is a deficient number, since it is larger than the sum of its proper divisors (149826483).

449167821 is a wasteful number, since it uses less digits than its factorization.

449167821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25971.

The product of its digits is 96768, while the sum is 42.

The square root of 449167821 is about 21193.5797117901. The cubic root of 449167821 is about 765.8367656363.

The spelling of 449167821 in words is "four hundred forty-nine million, one hundred sixty-seven thousand, eight hundred twenty-one".