63689712 has 20 divisors (see below), whose sum is σ = 164531880. Its totient is φ = 21229888.

The previous prime is 63689699. The next prime is 63689723. The reversal of 63689712 is 21798636.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663387 + ... + 663482.

It is an arithmetic number, because the mean of its divisors is an integer number (8226594).

Almost surely, 2^63689712 is an apocalyptic number.

It is an amenable number.

63689712 is an abundant number, since it is smaller than the sum of its proper divisors (100842168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63689712 is a wasteful number, since it uses less digits than its factorization.

63689712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326880 (or 1326874 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 63689712 is about 7980.5834373184. The cubic root of 63689712 is about 399.3525191536.

The spelling of 63689712 in words is "sixty-three million, six hundred eighty-nine thousand, seven hundred twelve".