67045409 has 2 divisors, whose sum is σ = 67045410. Its totient is φ = 67045408.

The previous prime is 67045403. The next prime is 67045411. The reversal of 67045409 is 90454076.

67045409 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., 62410000 + 4635409 = 7900^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 67045409 - 2¹⁶ = 66979873 is a prime.

Together with 67045411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67045403) 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, 33522704 + 33522705.

It is an arithmetic number, because the mean of its divisors is an integer number (33522705).

Almost surely, 2^67045409 is an apocalyptic number.

It is an amenable number.

67045409 is a deficient number, since it is larger than the sum of its proper divisors (1).

67045409 is an equidigital number, since it uses as much as digits as its factorization.

67045409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 67045409 is about 8188.1260981985. The cubic root of 67045409 is about 406.2465459588.

The spelling of 67045409 in words is "sixty-seven million, forty-five thousand, four hundred nine".