688168437 has 16 divisors (see below), whose sum is σ = 1004247552. Its totient is φ = 415707120.

The previous prime is 688168417. The next prime is 688168493. The reversal of 688168437 is 734861886.

688168437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688168437 - 2⁷ = 688168309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688168437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688168417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23833 + ... + 44094.

It is an arithmetic number, because the mean of its divisors is an integer number (62765472).

Almost surely, 2^688168437 is an apocalyptic number.

It is an amenable number.

688168437 is a deficient number, since it is larger than the sum of its proper divisors (316079115).

688168437 is a wasteful number, since it uses less digits than its factorization.

688168437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68248.

The product of its digits is 1548288, while the sum is 51.

The square root of 688168437 is about 26232.9647009254. The cubic root of 688168437 is about 882.8730294156.

The spelling of 688168437 in words is "six hundred eighty-eight million, one hundred sixty-eight thousand, four hundred thirty-seven".