63520063 has 4 divisors (see below), whose sum is σ = 65710440. Its totient is φ = 61329688.

The previous prime is 63520031. The next prime is 63520069. The reversal of 63520063 is 36002536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63520063 - 2⁵ = 63520031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63520069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095145 + ... + 1095202.

It is an arithmetic number, because the mean of its divisors is an integer number (16427610).

Almost surely, 2^63520063 is an apocalyptic number.

63520063 is a deficient number, since it is larger than the sum of its proper divisors (2190377).

63520063 is a wasteful number, since it uses less digits than its factorization.

63520063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190376.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 63520063 is about 7969.9474904167. The cubic root of 63520063 is about 398.9976214413.

Adding to 63520063 its reverse (36002536), we get a palindrome (99522599).

The spelling of 63520063 in words is "sixty-three million, five hundred twenty thousand, sixty-three".