688342843 has 2 divisors, whose sum is σ = 688342844. Its totient is φ = 688342842.

The previous prime is 688342841. The next prime is 688342847. The reversal of 688342843 is 348243886.

688342843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688342843 - 2¹ = 688342841 is a prime.

Together with 688342841, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 688342793 and 688342802.

It is not a weakly prime, because it can be changed into another prime (688342841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344171421 + 344171422.

It is an arithmetic number, because the mean of its divisors is an integer number (344171422).

Almost surely, 2^688342843 is an apocalyptic number.

688342843 is a deficient number, since it is larger than the sum of its proper divisors (1).

688342843 is an equidigital number, since it uses as much as digits as its factorization.

688342843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 46.

The square root of 688342843 is about 26236.2886666541. The cubic root of 688342843 is about 882.9476067716.

The spelling of 688342843 in words is "six hundred eighty-eight million, three hundred forty-two thousand, eight hundred forty-three".