687924242 has 16 divisors (see below), whose sum is σ = 1069580160. Its totient is φ = 331616208.

The previous prime is 687924229. The next prime is 687924253. The reversal of 687924242 is 242429786.

It is a junction number, because it is equal to n+sod(n) for n = 687924193 and 687924202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48317 + ... + 60912.

It is an arithmetic number, because the mean of its divisors is an integer number (66848760).

Almost surely, 2^687924242 is an apocalyptic number.

687924242 is a deficient number, since it is larger than the sum of its proper divisors (381655918).

687924242 is a wasteful number, since it uses less digits than its factorization.

687924242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109345.

The product of its digits is 387072, while the sum is 44.

The square root of 687924242 is about 26228.3099341151. The cubic root of 687924242 is about 882.7685885676.

The spelling of 687924242 in words is "six hundred eighty-seven million, nine hundred twenty-four thousand, two hundred forty-two".