63996687 has 12 divisors (see below), whose sum is σ = 97877520. Its totient is φ = 40154688.

The previous prime is 63996683. The next prime is 63996701. The reversal of 63996687 is 78669936.

It is a happy number.

It is not a de Polignac number, because 63996687 - 2² = 63996683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63996683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208987 + ... + 209292.

It is an arithmetic number, because the mean of its divisors is an integer number (8156460).

Almost surely, 2^63996687 is an apocalyptic number.

63996687 is a deficient number, since it is larger than the sum of its proper divisors (33880833).

63996687 is a wasteful number, since it uses less digits than its factorization.

63996687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418302 (or 418299 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 63996687 is about 7999.7929348203. The cubic root of 63996687 is about 399.9930977976.

The spelling of 63996687 in words is "sixty-three million, nine hundred ninety-six thousand, six hundred eighty-seven".