63388561 has 2 divisors, whose sum is σ = 63388562. Its totient is φ = 63388560.

The previous prime is 63388537. The next prime is 63388603. The reversal of 63388561 is 16588336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58614336 + 4774225 = 7656^2 + 2185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63388561 is a prime.

It is not a weakly prime, because it can be changed into another prime (63388861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31694280 + 31694281.

It is an arithmetic number, because the mean of its divisors is an integer number (31694281).

Almost surely, 2^63388561 is an apocalyptic number.

It is an amenable number.

63388561 is a deficient number, since it is larger than the sum of its proper divisors (1).

63388561 is an equidigital number, since it uses as much as digits as its factorization.

63388561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 63388561 is about 7961.6933500355. The cubic root of 63388561 is about 398.7220904658.

The spelling of 63388561 in words is "sixty-three million, three hundred eighty-eight thousand, five hundred sixty-one".