630388207 has 4 divisors (see below), whose sum is σ = 631278040. Its totient is φ = 629498376.

The previous prime is 630388153. The next prime is 630388217. The reversal of 630388207 is 702883036.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630388207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630388217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443853 + ... + 445270.

It is an arithmetic number, because the mean of its divisors is an integer number (157819510).

Almost surely, 2^630388207 is an apocalyptic number.

630388207 is a deficient number, since it is larger than the sum of its proper divisors (889833).

630388207 is an equidigital number, since it uses as much as digits as its factorization.

630388207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889832.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 630388207 is about 25107.5328736218. The cubic root of 630388207 is about 857.4379341218.

The spelling of 630388207 in words is "six hundred thirty million, three hundred eighty-eight thousand, two hundred seven".