630517871 has 2 divisors, whose sum is σ = 630517872. Its totient is φ = 630517870.

The previous prime is 630517861. The next prime is 630517891. The reversal of 630517871 is 178715036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630517871 - 2¹⁸ = 630255727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630517861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315258935 + 315258936.

It is an arithmetic number, because the mean of its divisors is an integer number (315258936).

Almost surely, 2^630517871 is an apocalyptic number.

630517871 is a deficient number, since it is larger than the sum of its proper divisors (1).

630517871 is an equidigital number, since it uses as much as digits as its factorization.

630517871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 630517871 is about 25110.1149141138. The cubic root of 630517871 is about 857.4967186449.

The spelling of 630517871 in words is "six hundred thirty million, five hundred seventeen thousand, eight hundred seventy-one".