604397221 has 2 divisors, whose sum is σ = 604397222. Its totient is φ = 604397220.

The previous prime is 604397179. The next prime is 604397249. The reversal of 604397221 is 122793406.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353966596 + 250430625 = 18814^2 + 15825^2 .

It is a cyclic number.

It is not a de Polignac number, because 604397221 - 2¹⁷ = 604266149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604397291) 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, 302198610 + 302198611.

It is an arithmetic number, because the mean of its divisors is an integer number (302198611).

Almost surely, 2^604397221 is an apocalyptic number.

It is an amenable number.

604397221 is a deficient number, since it is larger than the sum of its proper divisors (1).

604397221 is an equidigital number, since it uses as much as digits as its factorization.

604397221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 604397221 is about 24584.4914732845. The cubic root of 604397221 is about 845.4880744160.

The spelling of 604397221 in words is "six hundred four million, three hundred ninety-seven thousand, two hundred twenty-one".