63687885 has 16 divisors (see below), whose sum is σ = 102182784. Its totient is φ = 33872832.

The previous prime is 63687881. The next prime is 63687889. The reversal of 63687885 is 58878636.

It is an interprime number because it is at equal distance from previous prime (63687881) and next prime (63687889).

It is not a de Polignac number, because 63687885 - 2² = 63687881 is a prime.

It is a super-2 number, since 2×63687885² = 8112293391546450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63687881) 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, 97 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (6386424).

Almost surely, 2^63687885 is an apocalyptic number.

It is an amenable number.

63687885 is a deficient number, since it is larger than the sum of its proper divisors (38494899).

63687885 is a wasteful number, since it uses less digits than its factorization.

63687885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11764.

The product of its digits is 1935360, while the sum is 51.

The square root of 63687885 is about 7980.4689711821. The cubic root of 63687885 is about 399.3487005147.

Subtracting from 63687885 its reverse (58878636), we obtain a square (4809249 = 2193²).

The spelling of 63687885 in words is "sixty-three million, six hundred eighty-seven thousand, eight hundred eighty-five".