630323189 has 2 divisors, whose sum is σ = 630323190. Its totient is φ = 630323188.

The previous prime is 630323179. The next prime is 630323273. The reversal of 630323189 is 981323036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605652100 + 24671089 = 24610^2 + 4967^2 .

It is a cyclic number.

It is not a de Polignac number, because 630323189 - 2⁴ = 630323173 is a prime.

It is a super-2 number, since 2×630323189² = 794614645182259442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630323159) 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 as a sum of consecutive naturals, namely, 315161594 + 315161595.

It is an arithmetic number, because the mean of its divisors is an integer number (315161595).

Almost surely, 2^630323189 is an apocalyptic number.

It is an amenable number.

630323189 is a deficient number, since it is larger than the sum of its proper divisors (1).

630323189 is an equidigital number, since it uses as much as digits as its factorization.

630323189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 630323189 is about 25106.2380495366. The cubic root of 630323189 is about 857.4084545008.

It can be divided in two parts, 6303 and 23189, that added together give a palindrome (29492).

The spelling of 630323189 in words is "six hundred thirty million, three hundred twenty-three thousand, one hundred eighty-nine".