63899812 has 24 divisors (see below), whose sum is σ = 120587040. Its totient is φ = 29528640.

The previous prime is 63899807. The next prime is 63899827. The reversal of 63899812 is 21899836.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7138 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (5024460).

Almost surely, 2^63899812 is an apocalyptic number.

It is an amenable number.

63899812 is a deficient number, since it is larger than the sum of its proper divisors (56687228).

63899812 is a wasteful number, since it uses less digits than its factorization.

63899812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20571 (or 20569 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 63899812 is about 7993.7357974854. The cubic root of 63899812 is about 399.7911659899.

The spelling of 63899812 in words is "sixty-three million, eight hundred ninety-nine thousand, eight hundred twelve".