604771021 has 2 divisors, whose sum is σ = 604771022. Its totient is φ = 604771020.

The previous prime is 604770997. The next prime is 604771051. The reversal of 604771021 is 120177406.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604618921 + 152100 = 24589^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 604771021 - 2¹⁹ = 604246733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604771051) 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 as a sum of consecutive naturals, namely, 302385510 + 302385511.

It is an arithmetic number, because the mean of its divisors is an integer number (302385511).

Almost surely, 2^604771021 is an apocalyptic number.

It is an amenable number.

604771021 is a deficient number, since it is larger than the sum of its proper divisors (1).

604771021 is an equidigital number, since it uses as much as digits as its factorization.

604771021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 604771021 is about 24592.0926519074. The cubic root of 604771021 is about 845.6623407756.

The spelling of 604771021 in words is "six hundred four million, seven hundred seventy-one thousand, twenty-one".