687055025 has 24 divisors (see below), whose sum is σ = 868765824. Its totient is φ = 538904000.

The previous prime is 687055003. The next prime is 687055027. The reversal of 687055025 is 520550786.

It is not a de Polignac number, because 687055025 - 2¹⁰ = 687054001 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 687055025.

It is not an unprimeable number, because it can be changed into a prime (687055027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268904 + ... + 271446.

It is an arithmetic number, because the mean of its divisors is an integer number (36198576).

Almost surely, 2^687055025 is an apocalyptic number.

It is an amenable number.

687055025 is a deficient number, since it is larger than the sum of its proper divisors (181710799).

687055025 is a wasteful number, since it uses less digits than its factorization.

687055025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 687055025 is about 26211.7344904911. The cubic root of 687055025 is about 882.3966285842.

The spelling of 687055025 in words is "six hundred eighty-seven million, fifty-five thousand, twenty-five".