634665011 has 2 divisors, whose sum is σ = 634665012. Its totient is φ = 634665010.

The previous prime is 634664977. The next prime is 634665047. The reversal of 634665011 is 110566436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634665011 - 2¹⁰ = 634663987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634668011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317332505 + 317332506.

It is an arithmetic number, because the mean of its divisors is an integer number (317332506).

Almost surely, 2^634665011 is an apocalyptic number.

634665011 is a deficient number, since it is larger than the sum of its proper divisors (1).

634665011 is an equidigital number, since it uses as much as digits as its factorization.

634665011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 634665011 is about 25192.5586433772. The cubic root of 634665011 is about 859.3726319556.

The spelling of 634665011 in words is "six hundred thirty-four million, six hundred sixty-five thousand, eleven".