63715657 has 2 divisors, whose sum is σ = 63715658. Its totient is φ = 63715656.

The previous prime is 63715601. The next prime is 63715667. The reversal of 63715657 is 75651736.

It is a happy number.

63715657 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., 33454656 + 30261001 = 5784^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 63715657 - 2¹⁹ = 63191369 is a prime.

It is not a weakly prime, because it can be changed into another prime (63715667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31857828 + 31857829.

It is an arithmetic number, because the mean of its divisors is an integer number (31857829).

Almost surely, 2^63715657 is an apocalyptic number.

It is an amenable number.

63715657 is a deficient number, since it is larger than the sum of its proper divisors (1).

63715657 is an equidigital number, since it uses as much as digits as its factorization.

63715657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 40.

The square root of 63715657 is about 7982.2087795296. The cubic root of 63715657 is about 399.4067392893.

The spelling of 63715657 in words is "sixty-three million, seven hundred fifteen thousand, six hundred fifty-seven".