63730217 has 6 divisors (see below), whose sum is σ = 66622122. Its totient is φ = 60958832.

The previous prime is 63730213. The next prime is 63730273. The reversal of 63730217 is 71203736.

63730217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63696361 + 33856 = 7981^2 + 184^2 .

It is not a de Polignac number, because 63730217 - 2² = 63730213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63730217.

It is not an unprimeable number, because it can be changed into a prime (63730213) 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 in 5 ways as a sum of consecutive naturals, for example, 59708 + ... + 60765.

It is an arithmetic number, because the mean of its divisors is an integer number (11103687).

Almost surely, 2^63730217 is an apocalyptic number.

It is an amenable number.

63730217 is a deficient number, since it is larger than the sum of its proper divisors (2891905).

63730217 is a wasteful number, since it uses less digits than its factorization.

63730217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120519 (or 120496 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 63730217 is about 7983.1207556945. The cubic root of 63730217 is about 399.4371604840.

The spelling of 63730217 in words is "sixty-three million, seven hundred thirty thousand, two hundred seventeen".