604099021 has 2 divisors, whose sum is σ = 604099022. Its totient is φ = 604099020.

The previous prime is 604099009. The next prime is 604099031. The reversal of 604099021 is 120990406.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496665796 + 107433225 = 22286^2 + 10365^2 .

It is a cyclic number.

It is not a de Polignac number, because 604099021 - 2¹³ = 604090829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604099031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302049510 + 302049511.

It is an arithmetic number, because the mean of its divisors is an integer number (302049511).

Almost surely, 2^604099021 is an apocalyptic number.

It is an amenable number.

604099021 is a deficient number, since it is larger than the sum of its proper divisors (1).

604099021 is an equidigital number, since it uses as much as digits as its factorization.

604099021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 604099021 is about 24578.4259260027. The cubic root of 604099021 is about 845.3490014073.

The spelling of 604099021 in words is "six hundred four million, ninety-nine thousand, twenty-one".