634717971 has 32 divisors (see below), whose sum is σ = 992076800. Its totient is φ = 399958560.

The previous prime is 634717957. The next prime is 634717973. The reversal of 634717971 is 179717436.

It is a happy number.

634717971 is a `hidden beast` number, since 634 + 7 + 1 + 7 + 9 + 7 + 1 = 666.

It is not a de Polignac number, because 634717971 - 2⁶ = 634717907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634717973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276390 + ... + 278676.

It is an arithmetic number, because the mean of its divisors is an integer number (31002400).

Almost surely, 2^634717971 is an apocalyptic number.

634717971 is a deficient number, since it is larger than the sum of its proper divisors (357358829).

634717971 is a wasteful number, since it uses less digits than its factorization.

634717971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856 (or 2850 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 634717971 is about 25193.6097254840. The cubic root of 634717971 is about 859.3965349112.

The spelling of 634717971 in words is "six hundred thirty-four million, seven hundred seventeen thousand, nine hundred seventy-one".