634322161 has 8 divisors (see below), whose sum is σ = 696235104. Its totient is φ = 573117120.

The previous prime is 634322149. The next prime is 634322167. The reversal of 634322161 is 161223436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634322161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634322167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175096 + ... + 178681.

It is an arithmetic number, because the mean of its divisors is an integer number (87029388).

Almost surely, 2^634322161 is an apocalyptic number.

It is an amenable number.

634322161 is a deficient number, since it is larger than the sum of its proper divisors (61912943).

634322161 is a wasteful number, since it uses less digits than its factorization.

634322161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353951.

The product of its digits is 5184, while the sum is 28.

The square root of 634322161 is about 25185.7531354534. The cubic root of 634322161 is about 859.2178579292.

Adding to 634322161 its reverse (161223436), we get a palindrome (795545597).

The spelling of 634322161 in words is "six hundred thirty-four million, three hundred twenty-two thousand, one hundred sixty-one".