63513985 has 4 divisors (see below), whose sum is σ = 76216788. Its totient is φ = 50811184.

The previous prime is 63513977. The next prime is 63514001. The reversal of 63513985 is 58931536.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7817616 + 55696369 = 2796^2 + 7463^2 .

It is a cyclic number.

It is not a de Polignac number, because 63513985 - 2³ = 63513977 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6351394 + ... + 6351403.

It is an arithmetic number, because the mean of its divisors is an integer number (19054197).

Almost surely, 2^63513985 is an apocalyptic number.

It is an amenable number.

63513985 is a deficient number, since it is larger than the sum of its proper divisors (12702803).

63513985 is a wasteful number, since it uses less digits than its factorization.

63513985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12702802.

The product of its digits is 97200, while the sum is 40.

The square root of 63513985 is about 7969.5661738893. The cubic root of 63513985 is about 398.9848948329.

The spelling of 63513985 in words is "sixty-three million, five hundred thirteen thousand, nine hundred eighty-five".