630343897 has 2 divisors, whose sum is σ = 630343898. Its totient is φ = 630343896.

The previous prime is 630343871. The next prime is 630343919. The reversal of 630343897 is 798343036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371101696 + 259242201 = 19264^2 + 16101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630343897 is a prime.

It is not a weakly prime, because it can be changed into another prime (630343807) 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, 315171948 + 315171949.

It is an arithmetic number, because the mean of its divisors is an integer number (315171949).

Almost surely, 2^630343897 is an apocalyptic number.

It is an amenable number.

630343897 is a deficient number, since it is larger than the sum of its proper divisors (1).

630343897 is an equidigital number, since it uses as much as digits as its factorization.

630343897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 630343897 is about 25106.6504536149. The cubic root of 630343897 is about 857.4178438744.

The spelling of 630343897 in words is "six hundred thirty million, three hundred forty-three thousand, eight hundred ninety-seven".