63545809 has 2 divisors, whose sum is σ = 63545810. Its totient is φ = 63545808.

The previous prime is 63545791. The next prime is 63545819. The reversal of 63545809 is 90854536.

63545809 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., 62489025 + 1056784 = 7905^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 63545809 - 2¹⁹ = 63021521 is a prime.

It is not a weakly prime, because it can be changed into another prime (63545819) 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, 31772904 + 31772905.

It is an arithmetic number, because the mean of its divisors is an integer number (31772905).

Almost surely, 2^63545809 is an apocalyptic number.

It is an amenable number.

63545809 is a deficient number, since it is larger than the sum of its proper divisors (1).

63545809 is an equidigital number, since it uses as much as digits as its factorization.

63545809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 63545809 is about 7971.5625193559. The cubic root of 63545809 is about 399.0515214990.

The spelling of 63545809 in words is "sixty-three million, five hundred forty-five thousand, eight hundred nine".