687107505 has 32 divisors (see below), whose sum is σ = 1257410304. Its totient is φ = 313860096.

The previous prime is 687107503. The next prime is 687107521. The reversal of 687107505 is 505701786.

It is not a de Polignac number, because 687107505 - 2¹ = 687107503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687107503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248209 + ... + 250961.

It is an arithmetic number, because the mean of its divisors is an integer number (39294072).

Almost surely, 2^687107505 is an apocalyptic number.

It is an amenable number.

687107505 is a deficient number, since it is larger than the sum of its proper divisors (570302799).

687107505 is a wasteful number, since it uses less digits than its factorization.

687107505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 687107505 is about 26212.7355497285. The cubic root of 687107505 is about 882.4190950021.

The spelling of 687107505 in words is "six hundred eighty-seven million, one hundred seven thousand, five hundred five".