634439062693 has 2 divisors, whose sum is σ = 634439062694. Its totient is φ = 634439062692.

The previous prime is 634439062643. The next prime is 634439062729. The reversal of 634439062693 is 396260934436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614370657124 + 20068405569 = 783818^2 + 141663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634439062693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634439062643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317219531346 + 317219531347.

It is an arithmetic number, because the mean of its divisors is an integer number (317219531347).

Almost surely, 2^634439062693 is an apocalyptic number.

It is an amenable number.

634439062693 is a deficient number, since it is larger than the sum of its proper divisors (1).

634439062693 is an equidigital number, since it uses as much as digits as its factorization.

634439062693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 55.

The spelling of 634439062693 in words is "six hundred thirty-four billion, four hundred thirty-nine million, sixty-two thousand, six hundred ninety-three".