634430043243223 has 2 divisors, whose sum is σ = 634430043243224. Its totient is φ = 634430043243222.

The previous prime is 634430043243169. The next prime is 634430043243307. The reversal of 634430043243223 is 322342340034436.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634430043243223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634430043243223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634430043240223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317215021621611 + 317215021621612.

It is an arithmetic number, because the mean of its divisors is an integer number (317215021621612).

Almost surely, 2^{634430043243223} is an apocalyptic number.

634430043243223 is a deficient number, since it is larger than the sum of its proper divisors (1).

634430043243223 is an equidigital number, since it uses as much as digits as its factorization.

634430043243223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 43.

Adding to 634430043243223 its reverse (322342340034436), we get a palindrome (956772383277659).

The spelling of 634430043243223 in words is "six hundred thirty-four trillion, four hundred thirty billion, forty-three million, two hundred forty-three thousand, two hundred twenty-three".