63716587 has 4 divisors (see below), whose sum is σ = 69509016. Its totient is φ = 57924160.

The previous prime is 63716573. The next prime is 63716599. The reversal of 63716587 is 78561736.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63716587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63716087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2896198 + ... + 2896219.

It is an arithmetic number, because the mean of its divisors is an integer number (17377254).

Almost surely, 2^63716587 is an apocalyptic number.

63716587 is a deficient number, since it is larger than the sum of its proper divisors (5792429).

63716587 is a wasteful number, since it uses less digits than its factorization.

63716587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792428.

The product of its digits is 211680, while the sum is 43.

The square root of 63716587 is about 7982.2670338695. The cubic root of 63716587 is about 399.4086825399.

The spelling of 63716587 in words is "sixty-three million, seven hundred sixteen thousand, five hundred eighty-seven".