630007309 has 2 divisors, whose sum is σ = 630007310. Its totient is φ = 630007308.

The previous prime is 630007307. The next prime is 630007321. The reversal of 630007309 is 903700036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616131684 + 13875625 = 24822^2 + 3725^2 .

It is a cyclic number.

It is not a de Polignac number, because 630007309 - 2¹ = 630007307 is a prime.

Together with 630007307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630007303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315003654 + 315003655.

It is an arithmetic number, because the mean of its divisors is an integer number (315003655).

Almost surely, 2^630007309 is an apocalyptic number.

It is an amenable number.

630007309 is a deficient number, since it is larger than the sum of its proper divisors (1).

630007309 is an equidigital number, since it uses as much as digits as its factorization.

630007309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 630007309 is about 25099.9463943651. The cubic root of 630007309 is about 857.2652034181.

The spelling of 630007309 in words is "six hundred thirty million, seven thousand, three hundred nine".