687125405 has 8 divisors (see below), whose sum is σ = 867948000. Its totient is φ = 520768656.

The previous prime is 687125393. The next prime is 687125419. The reversal of 687125405 is 504521786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 687125405 - 2¹⁴ = 687109021 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3616355 + ... + 3616544.

It is an arithmetic number, because the mean of its divisors is an integer number (108493500).

Almost surely, 2^687125405 is an apocalyptic number.

It is an amenable number.

687125405 is a deficient number, since it is larger than the sum of its proper divisors (180822595).

687125405 is a wasteful number, since it uses less digits than its factorization.

687125405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232923.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 687125405 is about 26213.0769845892. The cubic root of 687125405 is about 882.4267576384.

The spelling of 687125405 in words is "six hundred eighty-seven million, one hundred twenty-five thousand, four hundred five".