630238313 has 2 divisors, whose sum is σ = 630238314. Its totient is φ = 630238312.

The previous prime is 630238309. The next prime is 630238319. The reversal of 630238313 is 313832036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557101609 + 73136704 = 23603^2 + 8552^2 .

It is a cyclic number.

It is not a de Polignac number, because 630238313 - 2² = 630238309 is a prime.

It is not a weakly prime, because it can be changed into another prime (630238319) 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, 315119156 + 315119157.

It is an arithmetic number, because the mean of its divisors is an integer number (315119157).

Almost surely, 2^630238313 is an apocalyptic number.

It is an amenable number.

630238313 is a deficient number, since it is larger than the sum of its proper divisors (1).

630238313 is an equidigital number, since it uses as much as digits as its factorization.

630238313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 630238313 is about 25104.5476557535. The cubic root of 630238313 is about 857.3699680714.

The spelling of 630238313 in words is "six hundred thirty million, two hundred thirty-eight thousand, three hundred thirteen".