634870571 has 2 divisors, whose sum is σ = 634870572. Its totient is φ = 634870570.

The previous prime is 634870513. The next prime is 634870573. The reversal of 634870571 is 175078436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634870571 - 2⁶ = 634870507 is a prime.

Together with 634870573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634870573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317435285 + 317435286.

It is an arithmetic number, because the mean of its divisors is an integer number (317435286).

Almost surely, 2^634870571 is an apocalyptic number.

634870571 is a deficient number, since it is larger than the sum of its proper divisors (1).

634870571 is an equidigital number, since it uses as much as digits as its factorization.

634870571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 634870571 is about 25196.6380892372. The cubic root of 634870571 is about 859.4654019296.

The spelling of 634870571 in words is "six hundred thirty-four million, eight hundred seventy thousand, five hundred seventy-one".