630380189 has 2 divisors, whose sum is σ = 630380190. Its totient is φ = 630380188.

The previous prime is 630380173. The next prime is 630380209. The reversal of 630380189 is 981083036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 576240025 + 54140164 = 24005^2 + 7358^2 .

It is a cyclic number.

It is not a de Polignac number, because 630380189 - 2⁴ = 630380173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630380489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315190094 + 315190095.

It is an arithmetic number, because the mean of its divisors is an integer number (315190095).

Almost surely, 2^630380189 is an apocalyptic number.

It is an amenable number.

630380189 is a deficient number, since it is larger than the sum of its proper divisors (1).

630380189 is an equidigital number, since it uses as much as digits as its factorization.

630380189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 630380189 is about 25107.3731999188. The cubic root of 630380189 is about 857.4342988135.

The spelling of 630380189 in words is "six hundred thirty million, three hundred eighty thousand, one hundred eighty-nine".