630871 has 2 divisors, whose sum is σ = 630872. Its totient is φ = 630870.

The previous prime is 630863. The next prime is 630893. The reversal of 630871 is 178036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630871 - 2³ = 630863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315435 + 315436.

It is an arithmetic number, because the mean of its divisors is an integer number (315436).

2⁶³⁰⁸⁷¹ is an apocalyptic number.

630871 is a deficient number, since it is larger than the sum of its proper divisors (1).

630871 is an equidigital number, since it uses as much as digits as its factorization.

630871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 630871 is about 794.2738822346. The cubic root of 630871 is about 85.7656772499.

The spelling of 630871 in words is "six hundred thirty thousand, eight hundred seventy-one".