634508971 has 4 divisors (see below), whose sum is σ = 667904200. Its totient is φ = 601113744.

The previous prime is 634508921. The next prime is 634508983. The reversal of 634508971 is 179805436.

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-634508971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634508921) 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 in 3 ways as a sum of consecutive naturals, for example, 16697586 + ... + 16697623.

It is an arithmetic number, because the mean of its divisors is an integer number (166976050).

Almost surely, 2^634508971 is an apocalyptic number.

634508971 is a deficient number, since it is larger than the sum of its proper divisors (33395229).

634508971 is a wasteful number, since it uses less digits than its factorization.

634508971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33395228.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 634508971 is about 25189.4615067492. The cubic root of 634508971 is about 859.3021971622.

The spelling of 634508971 in words is "six hundred thirty-four million, five hundred eight thousand, nine hundred seventy-one".