688341777 has 4 divisors (see below), whose sum is σ = 917789040. Its totient is φ = 458894516.

The previous prime is 688341757. The next prime is 688341791. The reversal of 688341777 is 777143886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 688341777 - 2¹⁰ = 688340753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688341737) 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 3 ways as a sum of consecutive naturals, for example, 114723627 + ... + 114723632.

It is an arithmetic number, because the mean of its divisors is an integer number (229447260).

Almost surely, 2^688341777 is an apocalyptic number.

It is an amenable number.

688341777 is a deficient number, since it is larger than the sum of its proper divisors (229447263).

688341777 is a wasteful number, since it uses less digits than its factorization.

688341777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229447262.

The product of its digits is 1580544, while the sum is 51.

The square root of 688341777 is about 26236.2683512728. The cubic root of 688341777 is about 882.9471509800.

The spelling of 688341777 in words is "six hundred eighty-eight million, three hundred forty-one thousand, seven hundred seventy-seven".