630738569 has 2 divisors, whose sum is σ = 630738570. Its totient is φ = 630738568.

The previous prime is 630738553. The next prime is 630738599. The reversal of 630738569 is 965837036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630612544 + 126025 = 25112^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 630738569 - 2⁴ = 630738553 is a prime.

It is a super-2 number, since 2×630738569² = 795662284848335522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (630738509) 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, 315369284 + 315369285.

It is an arithmetic number, because the mean of its divisors is an integer number (315369285).

Almost surely, 2^630738569 is an apocalyptic number.

It is an amenable number.

630738569 is a deficient number, since it is larger than the sum of its proper divisors (1).

630738569 is an equidigital number, since it uses as much as digits as its factorization.

630738569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 630738569 is about 25114.5091331684. The cubic root of 630738569 is about 857.5967558488.

The spelling of 630738569 in words is "six hundred thirty million, seven hundred thirty-eight thousand, five hundred sixty-nine".