609395221 has 2 divisors, whose sum is σ = 609395222. Its totient is φ = 609395220.

The previous prime is 609395207. The next prime is 609395231. The reversal of 609395221 is 122593906.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530380900 + 79014321 = 23030^2 + 8889^2 .

It is a cyclic number.

It is not a de Polignac number, because 609395221 - 2¹¹ = 609393173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609395231) 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, 304697610 + 304697611.

It is an arithmetic number, because the mean of its divisors is an integer number (304697611).

Almost surely, 2^609395221 is an apocalyptic number.

It is an amenable number.

609395221 is a deficient number, since it is larger than the sum of its proper divisors (1).

609395221 is an equidigital number, since it uses as much as digits as its factorization.

609395221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 609395221 is about 24685.9316413215. The cubic root of 609395221 is about 847.8122382480.

The spelling of 609395221 in words is "six hundred nine million, three hundred ninety-five thousand, two hundred twenty-one".