688424079 has 12 divisors (see below), whose sum is σ = 1067760024. Its totient is φ = 393385104.

The previous prime is 688424029. The next prime is 688424089. The reversal of 688424079 is 970424886.

It is not a de Polignac number, because 688424079 - 2⁷ = 688423951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688424029) 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 11 ways as a sum of consecutive naturals, for example, 2341432 + ... + 2341725.

It is an arithmetic number, because the mean of its divisors is an integer number (88980002).

Almost surely, 2^688424079 is an apocalyptic number.

688424079 is a deficient number, since it is larger than the sum of its proper divisors (379335945).

688424079 is a wasteful number, since it uses less digits than its factorization.

688424079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683174 (or 4683167 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 688424079 is about 26237.8367820215. The cubic root of 688424079 is about 882.9823396140.

The spelling of 688424079 in words is "six hundred eighty-eight million, four hundred twenty-four thousand, seventy-nine".