63720113 has 2 divisors, whose sum is σ = 63720114. Its totient is φ = 63720112.

The previous prime is 63720089. The next prime is 63720119. The reversal of 63720113 is 31102736.

It is a happy number.

63720113 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., 63234304 + 485809 = 7952^2 + 697^2 .

It is a cyclic number.

It is not a de Polignac number, because 63720113 - 2⁶ = 63720049 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 (63720119) 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, 31860056 + 31860057.

It is an arithmetic number, because the mean of its divisors is an integer number (31860057).

Almost surely, 2^63720113 is an apocalyptic number.

It is an amenable number.

63720113 is a deficient number, since it is larger than the sum of its proper divisors (1).

63720113 is an equidigital number, since it uses as much as digits as its factorization.

63720113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 63720113 is about 7982.4878953870. The cubic root of 63720113 is about 399.4160500042.

Adding to 63720113 its reverse (31102736), we get a palindrome (94822849).

The spelling of 63720113 in words is "sixty-three million, seven hundred twenty thousand, one hundred thirteen".