688386743 has 8 divisors (see below), whose sum is σ = 762176640. Its totient is φ = 616465080.

The previous prime is 688386733. The next prime is 688386749. The reversal of 688386743 is 347683886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-688386743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688386749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466283 + ... + 467756.

It is an arithmetic number, because the mean of its divisors is an integer number (95272080).

Almost surely, 2^688386743 is an apocalyptic number.

688386743 is a deficient number, since it is larger than the sum of its proper divisors (73789897).

688386743 is a wasteful number, since it uses less digits than its factorization.

688386743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934117.

The product of its digits is 4644864, while the sum is 53.

The square root of 688386743 is about 26237.1252807925. The cubic root of 688386743 is about 882.9663767670.

The spelling of 688386743 in words is "six hundred eighty-eight million, three hundred eighty-six thousand, seven hundred forty-three".