632871857 has 2 divisors, whose sum is σ = 632871858. Its totient is φ = 632871856.

The previous prime is 632871829. The next prime is 632871871. The reversal of 632871857 is 758178236.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414896161 + 217975696 = 20369^2 + 14764^2 .

It is a cyclic number.

It is not a de Polignac number, because 632871857 - 2⁶ = 632871793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (632871457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316435928 + 316435929.

It is an arithmetic number, because the mean of its divisors is an integer number (316435929).

Almost surely, 2^632871857 is an apocalyptic number.

It is an amenable number.

632871857 is a deficient number, since it is larger than the sum of its proper divisors (1).

632871857 is an equidigital number, since it uses as much as digits as its factorization.

632871857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 632871857 is about 25156.9445084255. The cubic root of 632871857 is about 858.5625242573.

The spelling of 632871857 in words is "six hundred thirty-two million, eight hundred seventy-one thousand, eight hundred fifty-seven".