634603442321 has 2 divisors, whose sum is σ = 634603442322. Its totient is φ = 634603442320.

The previous prime is 634603442311. The next prime is 634603442329. The reversal of 634603442321 is 123244306436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619581508225 + 15021934096 = 787135^2 + 122564^2 .

It is a cyclic number.

It is not a de Polignac number, because 634603442321 - 2⁶ = 634603442257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (634603442329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317301721160 + 317301721161.

It is an arithmetic number, because the mean of its divisors is an integer number (317301721161).

Almost surely, 2^634603442321 is an apocalyptic number.

It is an amenable number.

634603442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

634603442321 is an equidigital number, since it uses as much as digits as its factorization.

634603442321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 38.

Adding to 634603442321 its reverse (123244306436), we get a palindrome (757847748757).

The spelling of 634603442321 in words is "six hundred thirty-four billion, six hundred three million, four hundred forty-two thousand, three hundred twenty-one".