63715987 has 8 divisors (see below), whose sum is σ = 69382800. Its totient is φ = 58280544.

The previous prime is 63715979. The next prime is 63715991. The reversal of 63715987 is 78951736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63715987 - 2³ = 63715979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63715997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57268 + ... + 58369.

It is an arithmetic number, because the mean of its divisors is an integer number (8672850).

Almost surely, 2^63715987 is an apocalyptic number.

63715987 is a deficient number, since it is larger than the sum of its proper divisors (5666813).

63715987 is a wasteful number, since it uses less digits than its factorization.

63715987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115685.

The product of its digits is 317520, while the sum is 46.

The square root of 63715987 is about 7982.2294504731. The cubic root of 63715987 is about 399.4074288320.

The spelling of 63715987 in words is "sixty-three million, seven hundred fifteen thousand, nine hundred eighty-seven".