634740133 has 2 divisors, whose sum is σ = 634740134. Its totient is φ = 634740132.

The previous prime is 634740121. The next prime is 634740187. The reversal of 634740133 is 331047436.

634740133 is nontrivially palindromic in base 3.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619113924 + 15626209 = 24882^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 634740133 - 2¹⁷ = 634609061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634740095 and 634740104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634740103) 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 as a sum of consecutive naturals, namely, 317370066 + 317370067.

It is an arithmetic number, because the mean of its divisors is an integer number (317370067).

Almost surely, 2^634740133 is an apocalyptic number.

It is an amenable number.

634740133 is a deficient number, since it is larger than the sum of its proper divisors (1).

634740133 is an equidigital number, since it uses as much as digits as its factorization.

634740133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 634740133 is about 25194.0495554010. The cubic root of 634740133 is about 859.4065371091.

Adding to 634740133 its reverse (331047436), we get a palindrome (965787569).

The spelling of 634740133 in words is "six hundred thirty-four million, seven hundred forty thousand, one hundred thirty-three".