604221389 has 2 divisors, whose sum is σ = 604221390. Its totient is φ = 604221388.

The previous prime is 604221383. The next prime is 604221391. The reversal of 604221389 is 983122406.

604221389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576480100 + 27741289 = 24010^2 + 5267^2 .

It is a cyclic number.

It is not a de Polignac number, because 604221389 - 2⁸ = 604221133 is a prime.

Together with 604221391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604221383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302110694 + 302110695.

It is an arithmetic number, because the mean of its divisors is an integer number (302110695).

Almost surely, 2^604221389 is an apocalyptic number.

It is an amenable number.

604221389 is a deficient number, since it is larger than the sum of its proper divisors (1).

604221389 is an equidigital number, since it uses as much as digits as its factorization.

604221389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 604221389 is about 24580.9151375615. The cubic root of 604221389 is about 845.4060763123.

The spelling of 604221389 in words is "six hundred four million, two hundred twenty-one thousand, three hundred eighty-nine".