604816321 has 4 divisors (see below), whose sum is σ = 611612100. Its totient is φ = 598020544.

The previous prime is 604816301. The next prime is 604816343. The reversal of 604816321 is 123618406.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87890625 + 516925696 = 9375^2 + 22736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-604816321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (604816301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3397756 + ... + 3397933.

It is an arithmetic number, because the mean of its divisors is an integer number (152903025).

Almost surely, 2^604816321 is an apocalyptic number.

It is an amenable number.

604816321 is a deficient number, since it is larger than the sum of its proper divisors (6795779).

604816321 is an equidigital number, since it uses as much as digits as its factorization.

604816321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795778.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 604816321 is about 24593.0136624205. The cubic root of 604816321 is about 845.6834548536.

The spelling of 604816321 in words is "six hundred four million, eight hundred sixteen thousand, three hundred twenty-one".