634641101 has 2 divisors, whose sum is σ = 634641102. Its totient is φ = 634641100.

The previous prime is 634641067. The next prime is 634641113. The reversal of 634641101 is 101146436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628755625 + 5885476 = 25075^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 634641101 - 2¹⁰ = 634640077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634641151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317320550 + 317320551.

It is an arithmetic number, because the mean of its divisors is an integer number (317320551).

Almost surely, 2^634641101 is an apocalyptic number.

It is an amenable number.

634641101 is a deficient number, since it is larger than the sum of its proper divisors (1).

634641101 is an equidigital number, since it uses as much as digits as its factorization.

634641101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 634641101 is about 25192.0840940165. The cubic root of 634641101 is about 859.3618399854.

Adding to 634641101 its reverse (101146436), we get a palindrome (735787537).

The spelling of 634641101 in words is "six hundred thirty-four million, six hundred forty-one thousand, one hundred one".