688767241 has 8 divisors (see below), whose sum is σ = 706192200. Its totient is φ = 671372160.

The previous prime is 688767227. The next prime is 688767263. The reversal of 688767241 is 142767886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 206525641 + 482241600 = 14371^2 + 21960^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 688767241 - 2¹¹ = 688765193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688767941) 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 7 ways as a sum of consecutive naturals, for example, 43555 + ... + 57223.

It is an arithmetic number, because the mean of its divisors is an integer number (88274025).

Almost surely, 2^688767241 is an apocalyptic number.

It is an amenable number.

688767241 is a deficient number, since it is larger than the sum of its proper divisors (17424959).

688767241 is a wasteful number, since it uses less digits than its factorization.

688767241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14939.

The product of its digits is 903168, while the sum is 49.

The square root of 688767241 is about 26244.3754164583. The cubic root of 688767241 is about 883.1290300343.

The spelling of 688767241 in words is "six hundred eighty-eight million, seven hundred sixty-seven thousand, two hundred forty-one".