688275229 has 2 divisors, whose sum is σ = 688275230. Its totient is φ = 688275228.

The previous prime is 688275199. The next prime is 688275233. The reversal of 688275229 is 922572886.

It is a happy number.

688275229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 688275225 + 4 = 26235^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 688275229 - 2⁷ = 688275101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688275629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344137614 + 344137615.

It is an arithmetic number, because the mean of its divisors is an integer number (344137615).

Almost surely, 2^688275229 is an apocalyptic number.

It is an amenable number.

688275229 is a deficient number, since it is larger than the sum of its proper divisors (1).

688275229 is an equidigital number, since it uses as much as digits as its factorization.

688275229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The square root of 688275229 is about 26235.0000762340. Note that the first 4 decimals coincide. The cubic root of 688275229 is about 882.9186959971.

The spelling of 688275229 in words is "six hundred eighty-eight million, two hundred seventy-five thousand, two hundred twenty-nine".