634109611 has 4 divisors (see below), whose sum is σ = 634508272. Its totient is φ = 633710952.

The previous prime is 634109587. The next prime is 634109633. The reversal of 634109611 is 116901436.

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

It is a cyclic number.

It is not a de Polignac number, because 634109611 - 2¹¹ = 634107563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634109711) 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 3 ways as a sum of consecutive naturals, for example, 196935 + ... + 200128.

It is an arithmetic number, because the mean of its divisors is an integer number (158627068).

Almost surely, 2^634109611 is an apocalyptic number.

634109611 is a deficient number, since it is larger than the sum of its proper divisors (398661).

634109611 is a wasteful number, since it uses less digits than its factorization.

634109611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398660.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 634109611 is about 25181.5331344221. The cubic root of 634109611 is about 859.1218777007.

The spelling of 634109611 in words is "six hundred thirty-four million, one hundred nine thousand, six hundred eleven".