604416821 has 2 divisors, whose sum is σ = 604416822. Its totient is φ = 604416820.

The previous prime is 604416817. The next prime is 604416829. The reversal of 604416821 is 128614406.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370755025 + 233661796 = 19255^2 + 15286^2 .

It is a cyclic number.

It is not a de Polignac number, because 604416821 - 2² = 604416817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604416829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302208410 + 302208411.

It is an arithmetic number, because the mean of its divisors is an integer number (302208411).

Almost surely, 2^604416821 is an apocalyptic number.

It is an amenable number.

604416821 is a deficient number, since it is larger than the sum of its proper divisors (1).

604416821 is an equidigital number, since it uses as much as digits as its factorization.

604416821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 604416821 is about 24584.8900953411. The cubic root of 604416821 is about 845.4972137626.

The spelling of 604416821 in words is "six hundred four million, four hundred sixteen thousand, eight hundred twenty-one".