67604209 has 2 divisors, whose sum is σ = 67604210. Its totient is φ = 67604208.

The previous prime is 67604197. The next prime is 67604219. The reversal of 67604209 is 90240676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 15186609 = 7240^2 + 3897^2 .

It is a cyclic number.

It is not a de Polignac number, because 67604209 - 2⁵ = 67604177 is a prime.

It is not a weakly prime, because it can be changed into another prime (67604219) 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, 33802104 + 33802105.

It is an arithmetic number, because the mean of its divisors is an integer number (33802105).

Almost surely, 2^67604209 is an apocalyptic number.

It is an amenable number.

67604209 is a deficient number, since it is larger than the sum of its proper divisors (1).

67604209 is an equidigital number, since it uses as much as digits as its factorization.

67604209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 67604209 is about 8222.1778745050. The cubic root of 67604209 is about 407.3720656769.

The spelling of 67604209 in words is "sixty-seven million, six hundred four thousand, two hundred nine".