687599225 has 12 divisors (see below), whose sum is σ = 865350864. Its totient is φ = 541867920.

The previous prime is 687599207. The next prime is 687599249. The reversal of 687599225 is 522995786.

It is not a de Polignac number, because 687599225 - 2⁶ = 687599161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203579 + ... + 206928.

It is an arithmetic number, because the mean of its divisors is an integer number (72112572).

Almost surely, 2^687599225 is an apocalyptic number.

It is an amenable number.

687599225 is a deficient number, since it is larger than the sum of its proper divisors (177751639).

687599225 is a wasteful number, since it uses less digits than its factorization.

687599225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410584 (or 410579 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 53.

The square root of 687599225 is about 26222.1132824950. The cubic root of 687599225 is about 882.6295422512.

The spelling of 687599225 in words is "six hundred eighty-seven million, five hundred ninety-nine thousand, two hundred twenty-five".