688333622749 has 2 divisors, whose sum is σ = 688333622750. Its totient is φ = 688333622748.

The previous prime is 688333622737. The next prime is 688333622759. The reversal of 688333622749 is 947226333886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401512322500 + 286821300249 = 633650^2 + 535557^2 .

It is a cyclic number.

It is not a de Polignac number, because 688333622749 - 2⁷ = 688333622621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688333622759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344166811374 + 344166811375.

It is an arithmetic number, because the mean of its divisors is an integer number (344166811375).

Almost surely, 2^688333622749 is an apocalyptic number.

It is an amenable number.

688333622749 is a deficient number, since it is larger than the sum of its proper divisors (1).

688333622749 is an equidigital number, since it uses as much as digits as its factorization.

688333622749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 61.

The spelling of 688333622749 in words is "six hundred eighty-eight billion, three hundred thirty-three million, six hundred twenty-two thousand, seven hundred forty-nine".