630337021 has 2 divisors, whose sum is σ = 630337022. Its totient is φ = 630337020.

The previous prime is 630337007. The next prime is 630337039. The reversal of 630337021 is 120733036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333464121 + 296872900 = 18261^2 + 17230^2 .

It is a cyclic number.

It is not a de Polignac number, because 630337021 - 2¹¹ = 630334973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630337051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315168510 + 315168511.

It is an arithmetic number, because the mean of its divisors is an integer number (315168511).

Almost surely, 2^630337021 is an apocalyptic number.

It is an amenable number.

630337021 is a deficient number, since it is larger than the sum of its proper divisors (1).

630337021 is an equidigital number, since it uses as much as digits as its factorization.

630337021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 630337021 is about 25106.5135174122. The cubic root of 630337021 is about 857.4147261971.

The spelling of 630337021 in words is "six hundred thirty million, three hundred thirty-seven thousand, twenty-one".