609221 has 2 divisors, whose sum is σ = 609222. Its totient is φ = 609220.

The previous prime is 609209. The next prime is 609227. The reversal of 609221 is 122906.

609221 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., 348100 + 261121 = 590^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 609193 and 609202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304610 + 304611.

It is an arithmetic number, because the mean of its divisors is an integer number (304611).

2⁶⁰⁹²²¹ is an apocalyptic number.

It is an amenable number.

609221 is a deficient number, since it is larger than the sum of its proper divisors (1).

609221 is an equidigital number, since it uses as much as digits as its factorization.

609221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 609221 is about 780.5261046243. The cubic root of 609221 is about 84.7731436403.

The spelling of 609221 in words is "six hundred nine thousand, two hundred twenty-one".