688275629 has 2 divisors, whose sum is σ = 688275630. Its totient is φ = 688275628.

The previous prime is 688275619. The next prime is 688275631. The reversal of 688275629 is 926572886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567868900 + 120406729 = 23830^2 + 10973^2 .

It is a cyclic number.

It is not a de Polignac number, because 688275629 - 2²⁸ = 419840173 is a prime.

Together with 688275631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688275619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344137814 + 344137815.

It is an arithmetic number, because the mean of its divisors is an integer number (344137815).

Almost surely, 2^688275629 is an apocalyptic number.

It is an amenable number.

688275629 is a deficient number, since it is larger than the sum of its proper divisors (1).

688275629 is an equidigital number, since it uses as much as digits as its factorization.

688275629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The square root of 688275629 is about 26235.0076996368. The cubic root of 688275629 is about 882.9188670369.

The spelling of 688275629 in words is "six hundred eighty-eight million, two hundred seventy-five thousand, six hundred twenty-nine".