64045609 has 2 divisors, whose sum is σ = 64045610. Its totient is φ = 64045608.

The previous prime is 64045607. The next prime is 64045651. The reversal of 64045609 is 90654046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43930384 + 20115225 = 6628^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 64045609 - 2¹ = 64045607 is a prime.

Together with 64045607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64045603) 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, 32022804 + 32022805.

It is an arithmetic number, because the mean of its divisors is an integer number (32022805).

Almost surely, 2^64045609 is an apocalyptic number.

It is an amenable number.

64045609 is a deficient number, since it is larger than the sum of its proper divisors (1).

64045609 is an equidigital number, since it uses as much as digits as its factorization.

64045609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 64045609 is about 8002.8500548242. The cubic root of 64045609 is about 400.0949961875.

The spelling of 64045609 in words is "sixty-four million, forty-five thousand, six hundred nine".