630630641 has 2 divisors, whose sum is σ = 630630642. Its totient is φ = 630630640.

The previous prime is 630630619. The next prime is 630630661. The reversal of 630630641 is 146036036.

630630641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432806416 + 197824225 = 20804^2 + 14065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630630641 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (630630601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315315320 + 315315321.

It is an arithmetic number, because the mean of its divisors is an integer number (315315321).

Almost surely, 2^630630641 is an apocalyptic number.

It is an amenable number.

630630641 is a deficient number, since it is larger than the sum of its proper divisors (1).

630630641 is an equidigital number, since it uses as much as digits as its factorization.

630630641 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 630630641 is about 25112.3603231556. The cubic root of 630630641 is about 857.5478375452.

Adding to 630630641 its reverse (146036036), we get a palindrome (776666677).

The spelling of 630630641 in words is "six hundred thirty million, six hundred thirty thousand, six hundred forty-one".