687547225 has 24 divisors (see below), whose sum is σ = 890300160. Its totient is φ = 526048320.

The previous prime is 687547219. The next prime is 687547247. The reversal of 687547225 is 522745786.

It is not a de Polignac number, because 687547225 - 2¹³ = 687539033 is a prime.

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, 73144 + ... + 82006.

It is an arithmetic number, because the mean of its divisors is an integer number (37095840).

Almost surely, 2^687547225 is an apocalyptic number.

It is an amenable number.

687547225 is a deficient number, since it is larger than the sum of its proper divisors (202752935).

687547225 is a wasteful number, since it uses less digits than its factorization.

687547225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009 (or 9004 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 687547225 is about 26221.1217342050. The cubic root of 687547225 is about 882.6072919385.

The spelling of 687547225 in words is "six hundred eighty-seven million, five hundred forty-seven thousand, two hundred twenty-five".