688067349 has 16 divisors (see below), whose sum is σ = 966456000. Its totient is φ = 434232576.

The previous prime is 688067339. The next prime is 688067353. The reversal of 688067349 is 943760886.

It is not a de Polignac number, because 688067349 - 2¹³ = 688059157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688067309) 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 in 15 ways as a sum of consecutive naturals, for example, 84397 + ... + 92189.

It is an arithmetic number, because the mean of its divisors is an integer number (60403500).

Almost surely, 2^688067349 is an apocalyptic number.

It is an amenable number.

688067349 is a deficient number, since it is larger than the sum of its proper divisors (278388651).

688067349 is a wasteful number, since it uses less digits than its factorization.

688067349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 688067349 is about 26231.0378940674. The cubic root of 688067349 is about 882.8297976357.

The spelling of 688067349 in words is "six hundred eighty-eight million, sixty-seven thousand, three hundred forty-nine".