688422280991 has 2 divisors, whose sum is σ = 688422280992. Its totient is φ = 688422280990.

The previous prime is 688422280969. The next prime is 688422280999. The reversal of 688422280991 is 199082224886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688422280991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688422280991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688422280999) 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, 344211140495 + 344211140496.

It is an arithmetic number, because the mean of its divisors is an integer number (344211140496).

Almost surely, 2^688422280991 is an apocalyptic number.

688422280991 is a deficient number, since it is larger than the sum of its proper divisors (1).

688422280991 is an equidigital number, since it uses as much as digits as its factorization.

688422280991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 688422280991 in words is "six hundred eighty-eight billion, four hundred twenty-two million, two hundred eighty thousand, nine hundred ninety-one".