630805801 has 2 divisors, whose sum is σ = 630805802. Its totient is φ = 630805800.

The previous prime is 630805789. The next prime is 630805817. The reversal of 630805801 is 108508036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 530104576 + 100701225 = 23024^2 + 10035^2 .

It is a cyclic number.

It is not a de Polignac number, because 630805801 - 2⁷ = 630805673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (630805891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315402900 + 315402901.

It is an arithmetic number, because the mean of its divisors is an integer number (315402901).

Almost surely, 2^630805801 is an apocalyptic number.

It is an amenable number.

630805801 is a deficient number, since it is larger than the sum of its proper divisors (1).

630805801 is an equidigital number, since it uses as much as digits as its factorization.

630805801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 630805801 is about 25115.8476066407. The cubic root of 630805801 is about 857.6272258932.

The spelling of 630805801 in words is "six hundred thirty million, eight hundred five thousand, eight hundred one".