688543371 has 6 divisors (see below), whose sum is σ = 994562660. Its totient is φ = 459028908.

The previous prime is 688543357. The next prime is 688543379. The reversal of 688543371 is 173345886.

It is not a de Polignac number, because 688543371 - 2⁹ = 688542859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688543379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38252401 + ... + 38252418.

Almost surely, 2^688543371 is an apocalyptic number.

688543371 is a deficient number, since it is larger than the sum of its proper divisors (306019289).

688543371 is a wasteful number, since it uses less digits than its factorization.

688543371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76504825 (or 76504822 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 688543371 is about 26240.1099654708. The cubic root of 688543371 is about 883.0333385302.

The spelling of 688543371 in words is "six hundred eighty-eight million, five hundred forty-three thousand, three hundred seventy-one".