688073069 has 2 divisors, whose sum is σ = 688073070. Its totient is φ = 688073068.

The previous prime is 688073051. The next prime is 688073081. The reversal of 688073069 is 960370886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359557444 + 328515625 = 18962^2 + 18125^2 .

It is a cyclic number.

It is not a de Polignac number, because 688073069 - 2⁸ = 688072813 is a prime.

It is a super-3 number, since 3×688073069³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688073669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344036534 + 344036535.

It is an arithmetic number, because the mean of its divisors is an integer number (344036535).

Almost surely, 2^688073069 is an apocalyptic number.

It is an amenable number.

688073069 is a deficient number, since it is larger than the sum of its proper divisors (1).

688073069 is an equidigital number, since it uses as much as digits as its factorization.

688073069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 688073069 is about 26231.1469249821. The cubic root of 688073069 is about 882.8322439915.

The spelling of 688073069 in words is "six hundred eighty-eight million, seventy-three thousand, sixty-nine".