63705994 has 24 divisors (see below), whose sum is σ = 105767424. Its totient is φ = 28539000.

The previous prime is 63705979. The next prime is 63705997. The reversal of 63705994 is 49950736.

It is a self number, because there is not a number n which added to its sum of digits gives 63705994.

It is not an unprimeable number, because it can be changed into a prime (63705997) 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, 421819 + ... + 421969.

It is an arithmetic number, because the mean of its divisors is an integer number (4406976).

Almost surely, 2^63705994 is an apocalyptic number.

63705994 is a deficient number, since it is larger than the sum of its proper divisors (42061430).

63705994 is a wasteful number, since it uses less digits than its factorization.

63705994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 63705994 is about 7981.6034729871. The cubic root of 63705994 is about 399.3865471700.

The spelling of 63705994 in words is "sixty-three million, seven hundred five thousand, nine hundred ninety-four".