688008723 has 4 divisors (see below), whose sum is σ = 917344968. Its totient is φ = 458672480.

The previous prime is 688008707. The next prime is 688008733. The reversal of 688008723 is 327800886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 688008723 - 2⁴ = 688008707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688008733) 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, 114668118 + ... + 114668123.

It is an arithmetic number, because the mean of its divisors is an integer number (229336242).

Almost surely, 2^688008723 is an apocalyptic number.

688008723 is a deficient number, since it is larger than the sum of its proper divisors (229336245).

688008723 is a wasteful number, since it uses less digits than its factorization.

688008723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229336244.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 688008723 is about 26229.9203773096. The cubic root of 688008723 is about 882.8047234189.

The spelling of 688008723 in words is "six hundred eighty-eight million, eight thousand, seven hundred twenty-three".