630663643 has 4 divisors (see below), whose sum is σ = 634440240. Its totient is φ = 626887048.

The previous prime is 630663629. The next prime is 630663673. The reversal of 630663643 is 346366036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 630663643 - 2²⁵ = 597109211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630663623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888048 + ... + 1888381.

It is an arithmetic number, because the mean of its divisors is an integer number (158610060).

Almost surely, 2^630663643 is an apocalyptic number.

630663643 is a deficient number, since it is larger than the sum of its proper divisors (3776597).

630663643 is a wasteful number, since it uses less digits than its factorization.

630663643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776596.

The product of its (nonzero) digits is 139968, while the sum is 37.

The square root of 630663643 is about 25113.0174013399. The cubic root of 630663643 is about 857.5627962750.

The spelling of 630663643 in words is "six hundred thirty million, six hundred sixty-three thousand, six hundred forty-three".