63685441 has 2 divisors, whose sum is σ = 63685442. Its totient is φ = 63685440.

The previous prime is 63685429. The next prime is 63685469. The reversal of 63685441 is 14458636.

It is a happy number.

63685441 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., 63680400 + 5041 = 7980^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685441 - 2⁷ = 63685313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63685441.

It is not a weakly prime, because it can be changed into another prime (63685411) 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, 31842720 + 31842721.

It is an arithmetic number, because the mean of its divisors is an integer number (31842721).

Almost surely, 2^63685441 is an apocalyptic number.

It is an amenable number.

63685441 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685441 is an equidigital number, since it uses as much as digits as its factorization.

63685441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 63685441 is about 7980.3158458798. The cubic root of 63685441 is about 399.3435921611.

The spelling of 63685441 in words is "sixty-three million, six hundred eighty-five thousand, four hundred forty-one".