688619754773 has 2 divisors, whose sum is σ = 688619754774. Its totient is φ = 688619754772.

The previous prime is 688619754737. The next prime is 688619754811. The reversal of 688619754773 is 377457916886.

Together with previous prime (688619754737) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568000380964 + 120619373809 = 753658^2 + 347303^2 .

It is a cyclic number.

It is not a de Polignac number, because 688619754773 - 2¹² = 688619750677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 688619754697 and 688619754706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688619757773) 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, 344309877386 + 344309877387.

It is an arithmetic number, because the mean of its divisors is an integer number (344309877387).

Almost surely, 2^688619754773 is an apocalyptic number.

It is an amenable number.

688619754773 is a deficient number, since it is larger than the sum of its proper divisors (1).

688619754773 is an equidigital number, since it uses as much as digits as its factorization.

688619754773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 426746880, while the sum is 71.

The spelling of 688619754773 in words is "six hundred eighty-eight billion, six hundred nineteen million, seven hundred fifty-four thousand, seven hundred seventy-three".