687487273 has 12 divisors (see below), whose sum is σ = 788526144. Its totient is φ = 597812600.

The previous prime is 687487267. The next prime is 687487291. The reversal of 687487273 is 372784786.

687487273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687487273 - 2²⁵ = 653932841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687487273.

It is not an unprimeable number, because it can be changed into a prime (687481273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120733 + ... + 126298.

It is an arithmetic number, because the mean of its divisors is an integer number (65710512).

Almost surely, 2^687487273 is an apocalyptic number.

It is an amenable number.

687487273 is a deficient number, since it is larger than the sum of its proper divisors (101038871).

687487273 is a wasteful number, since it uses less digits than its factorization.

687487273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247076 (or 247065 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 52.

The square root of 687487273 is about 26219.9785087631. The cubic root of 687487273 is about 882.5816376472.

The spelling of 687487273 in words is "six hundred eighty-seven million, four hundred eighty-seven thousand, two hundred seventy-three".