688133263 has 2 divisors, whose sum is σ = 688133264. Its totient is φ = 688133262.

The previous prime is 688133239. The next prime is 688133273. The reversal of 688133263 is 362331886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688133263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688133273) 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, 344066631 + 344066632.

It is an arithmetic number, because the mean of its divisors is an integer number (344066632).

Almost surely, 2^688133263 is an apocalyptic number.

688133263 is a deficient number, since it is larger than the sum of its proper divisors (1).

688133263 is an equidigital number, since it uses as much as digits as its factorization.

688133263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 688133263 is about 26232.2942763305. The cubic root of 688133263 is about 882.8579872141.

The spelling of 688133263 in words is "six hundred eighty-eight million, one hundred thirty-three thousand, two hundred sixty-three".