634851671 has 4 divisors (see below), whose sum is σ = 635003712. Its totient is φ = 634699632.

The previous prime is 634851631. The next prime is 634851709. The reversal of 634851671 is 176158436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634851671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634851631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69575 + ... + 78168.

It is an arithmetic number, because the mean of its divisors is an integer number (158750928).

Almost surely, 2^634851671 is an apocalyptic number.

634851671 is a deficient number, since it is larger than the sum of its proper divisors (152041).

634851671 is a wasteful number, since it uses less digits than its factorization.

634851671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152040.

The product of its digits is 120960, while the sum is 41.

The square root of 634851671 is about 25196.2630364108. The cubic root of 634851671 is about 859.4568731270.

It can be divided in two parts, 63485 and 1671, that added together give a palindrome (65156).

The spelling of 634851671 in words is "six hundred thirty-four million, eight hundred fifty-one thousand, six hundred seventy-one".