634231133 has 2 divisors, whose sum is σ = 634231134. Its totient is φ = 634231132.

The previous prime is 634231127. The next prime is 634231163. The reversal of 634231133 is 331132436.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609201124 + 25030009 = 24682^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 634231133 - 2¹² = 634227037 is a prime.

It is a super-3 number, since 3×634231133³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634231163) 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, 317115566 + 317115567.

It is an arithmetic number, because the mean of its divisors is an integer number (317115567).

Almost surely, 2^634231133 is an apocalyptic number.

It is an amenable number.

634231133 is a deficient number, since it is larger than the sum of its proper divisors (1).

634231133 is an equidigital number, since it uses as much as digits as its factorization.

634231133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 26.

The square root of 634231133 is about 25183.9459378391. The cubic root of 634231133 is about 859.1767554581.

Adding to 634231133 its reverse (331132436), we get a palindrome (965363569).

The spelling of 634231133 in words is "six hundred thirty-four million, two hundred thirty-one thousand, one hundred thirty-three".