63720089 has 2 divisors, whose sum is σ = 63720090. Its totient is φ = 63720088.

The previous prime is 63720079. The next prime is 63720113. The reversal of 63720089 is 98002736.

63720089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 7590025 = 7492^2 + 2755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63720089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63720049) 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, 31860044 + 31860045.

It is an arithmetic number, because the mean of its divisors is an integer number (31860045).

Almost surely, 2^63720089 is an apocalyptic number.

It is an amenable number.

63720089 is a deficient number, since it is larger than the sum of its proper divisors (1).

63720089 is an equidigital number, since it uses as much as digits as its factorization.

63720089 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 35.

The square root of 63720089 is about 7982.4863920961. The cubic root of 63720089 is about 399.4159998579.

The spelling of 63720089 in words is "sixty-three million, seven hundred twenty thousand, eighty-nine".