63685057 has 2 divisors, whose sum is σ = 63685058. Its totient is φ = 63685056.

The previous prime is 63685051. The next prime is 63685087. The reversal of 63685057 is 75058636.

63685057 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., 52186176 + 11498881 = 7224^2 + 3391^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685057 - 2³ = 63685049 is a prime.

It is not a weakly prime, because it can be changed into another prime (63685051) 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, 31842528 + 31842529.

It is an arithmetic number, because the mean of its divisors is an integer number (31842529).

Almost surely, 2^63685057 is an apocalyptic number.

It is an amenable number.

63685057 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685057 is an equidigital number, since it uses as much as digits as its factorization.

63685057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 63685057 is about 7980.2917866454. The cubic root of 63685057 is about 399.3427895274.

The spelling of 63685057 in words is "sixty-three million, six hundred eighty-five thousand, fifty-seven".