687097725 has 24 divisors (see below), whose sum is σ = 1175177760. Its totient is φ = 353814720.

The previous prime is 687097673. The next prime is 687097729. The reversal of 687097725 is 527790786.

It is not a de Polignac number, because 687097725 - 2⁷ = 687097597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687097729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155779 + ... + 160128.

It is an arithmetic number, because the mean of its divisors is an integer number (48965740).

Almost surely, 2^687097725 is an apocalyptic number.

It is an amenable number.

687097725 is a deficient number, since it is larger than the sum of its proper divisors (488080035).

687097725 is a wasteful number, since it uses less digits than its factorization.

687097725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315949 (or 315944 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The square root of 687097725 is about 26212.5489985236. The cubic root of 687097725 is about 882.4149083212.

The spelling of 687097725 in words is "six hundred eighty-seven million, ninety-seven thousand, seven hundred twenty-five".