630645143 has 2 divisors, whose sum is σ = 630645144. Its totient is φ = 630645142.

The previous prime is 630645139. The next prime is 630645151. The reversal of 630645143 is 341546036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630645143 - 2² = 630645139 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630645943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315322571 + 315322572.

It is an arithmetic number, because the mean of its divisors is an integer number (315322572).

Almost surely, 2^630645143 is an apocalyptic number.

630645143 is a deficient number, since it is larger than the sum of its proper divisors (1).

630645143 is an equidigital number, since it uses as much as digits as its factorization.

630645143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 630645143 is about 25112.6490637686. The cubic root of 630645143 is about 857.5544108929.

The spelling of 630645143 in words is "six hundred thirty million, six hundred forty-five thousand, one hundred forty-three".