687259055 has 24 divisors (see below), whose sum is σ = 972894240. Its totient is φ = 464614080.

The previous prime is 687259049. The next prime is 687259087. The reversal of 687259055 is 550952786.

It is not a de Polignac number, because 687259055 - 2⁸ = 687258799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2360 + ... + 37149.

It is an arithmetic number, because the mean of its divisors is an integer number (40537260).

Almost surely, 2^687259055 is an apocalyptic number.

687259055 is a deficient number, since it is larger than the sum of its proper divisors (285635185).

687259055 is a wasteful number, since it uses less digits than its factorization.

687259055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39599 (or 39592 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 47.

The square root of 687259055 is about 26215.6261607462. The cubic root of 687259055 is about 882.4839663564.

The spelling of 687259055 in words is "six hundred eighty-seven million, two hundred fifty-nine thousand, fifty-five".