818449 has 4 divisors (see below), whose sum is σ = 820260. Its totient is φ = 816640.

The previous prime is 818429. The next prime is 818453. The reversal of 818449 is 944818.

818449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 65025 + 753424 = 255^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 818449 - 2¹¹ = 816401 is a prime.

It is a Duffinian number.

818449 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (818429) 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, 417 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (205065).

2⁸¹⁸⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

818449 is a deficient number, since it is larger than the sum of its proper divisors (1811).

818449 is an equidigital number, since it uses as much as digits as its factorization.

818449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810.

The product of its digits is 9216, while the sum is 34.

The square root of 818449 is about 904.6817119849. The cubic root of 818449 is about 93.5399659470.

The spelling of 818449 in words is "eight hundred eighteen thousand, four hundred forty-nine".