63987715 has 16 divisors (see below), whose sum is σ = 84082176. Its totient is φ = 46360800.

The previous prime is 63987713. The next prime is 63987731. The reversal of 63987715 is 51778936.

It is not a de Polignac number, because 63987715 - 2¹ = 63987713 is a prime.

It is a Duffinian number.

Its product of digits (317520) is a multiple of the sum of its prime divisors (4410).

It is not an unprimeable number, because it can be changed into a prime (63987713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13510 + ... + 17620.

It is an arithmetic number, because the mean of its divisors is an integer number (5255136).

Almost surely, 2^63987715 is an apocalyptic number.

63987715 is a deficient number, since it is larger than the sum of its proper divisors (20094461).

63987715 is a wasteful number, since it uses less digits than its factorization.

63987715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410.

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

The square root of 63987715 is about 7999.2321506505. The cubic root of 63987715 is about 399.9744046122.

The spelling of 63987715 in words is "sixty-three million, nine hundred eighty-seven thousand, seven hundred fifteen".