630429871 has 2 divisors, whose sum is σ = 630429872. Its totient is φ = 630429870.

The previous prime is 630429841. The next prime is 630429881. The reversal of 630429871 is 178924036.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630429871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630429841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315214935 + 315214936.

It is an arithmetic number, because the mean of its divisors is an integer number (315214936).

Almost surely, 2^630429871 is an apocalyptic number.

630429871 is a deficient number, since it is larger than the sum of its proper divisors (1).

630429871 is an equidigital number, since it uses as much as digits as its factorization.

630429871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 630429871 is about 25108.3625710638. The cubic root of 630429871 is about 857.4568238084.

The spelling of 630429871 in words is "six hundred thirty million, four hundred twenty-nine thousand, eight hundred seventy-one".