63445909 has 2 divisors, whose sum is σ = 63445910. Its totient is φ = 63445908.

The previous prime is 63445897. The next prime is 63445913. The reversal of 63445909 is 90954436.

63445909 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., 60372900 + 3073009 = 7770^2 + 1753^2 .

It is a cyclic number.

It is not a de Polignac number, because 63445909 - 2⁹ = 63445397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63445969) 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, 31722954 + 31722955.

It is an arithmetic number, because the mean of its divisors is an integer number (31722955).

Almost surely, 2^63445909 is an apocalyptic number.

It is an amenable number.

63445909 is a deficient number, since it is larger than the sum of its proper divisors (1).

63445909 is an equidigital number, since it uses as much as digits as its factorization.

63445909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 63445909 is about 7965.2940309822. The cubic root of 63445909 is about 398.8422962879.

The spelling of 63445909 in words is "sixty-three million, four hundred forty-five thousand, nine hundred nine".