3608221 has 2 divisors, whose sum is σ = 3608222. Its totient is φ = 3608220.

The previous prime is 3608219. The next prime is 3608239. The reversal of 3608221 is 1228063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 765625 = 1686^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3608221 - 2¹ = 3608219 is a prime.

It is a super-3 number, since 3×3608221³ (a number of 21 digits) contains 333 as substring.

Together with 3608219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3608192 and 3608201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3608251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804110 + 1804111.

It is an arithmetic number, because the mean of its divisors is an integer number (1804111).

Almost surely, 2^3608221 is an apocalyptic number.

It is an amenable number.

3608221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3608221 is an equidigital number, since it uses as much as digits as its factorization.

3608221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 3608221 is about 1899.5317844143. The cubic root of 3608221 is about 153.3784613021.

The spelling of 3608221 in words is "three million, six hundred eight thousand, two hundred twenty-one".