688989703 has 2 divisors, whose sum is σ = 688989704. Its totient is φ = 688989702.

The previous prime is 688989701. The next prime is 688989733. The reversal of 688989703 is 307989886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688989703 - 2¹ = 688989701 is a prime.

Together with 688989701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688989701) 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, 344494851 + 344494852.

It is an arithmetic number, because the mean of its divisors is an integer number (344494852).

Almost surely, 2^688989703 is an apocalyptic number.

688989703 is a deficient number, since it is larger than the sum of its proper divisors (1).

688989703 is an equidigital number, since it uses as much as digits as its factorization.

688989703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 688989703 is about 26248.6133538517. The cubic root of 688989703 is about 883.2240991621.

The spelling of 688989703 in words is "six hundred eighty-eight million, nine hundred eighty-nine thousand, seven hundred three".