688107241 has 4 divisors (see below), whose sum is σ = 706704772. Its totient is φ = 669509712.

The previous prime is 688107229. The next prime is 688107247. The reversal of 688107241 is 142701886.

688107241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142701886 = 2 ⋅71350943.

It can be written as a sum of positive squares in 2 ways, for example, as 450330841 + 237776400 = 21221^2 + 15420^2 .

It is a cyclic number.

It is not a de Polignac number, because 688107241 - 2¹⁷ = 687976169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 18597493 = 688107241 / (6 + 8 + 8 + 1 + 0 + 7 + 2 + 4 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688107241.

It is not an unprimeable number, because it can be changed into a prime (688107247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9298710 + ... + 9298783.

It is an arithmetic number, because the mean of its divisors is an integer number (176676193).

Almost surely, 2^688107241 is an apocalyptic number.

It is an amenable number.

688107241 is a deficient number, since it is larger than the sum of its proper divisors (18597531).

688107241 is a wasteful number, since it uses less digits than its factorization.

688107241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18597530.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 688107241 is about 26231.7982799502. The cubic root of 688107241 is about 882.8468585459.

The spelling of 688107241 in words is "six hundred eighty-eight million, one hundred seven thousand, two hundred forty-one".