687087427 has 8 divisors (see below), whose sum is σ = 740146176. Its totient is φ = 634058112.

The previous prime is 687087397. The next prime is 687087439. The reversal of 687087427 is 724780786.

It is a happy number.

687087427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 687087427 - 2²³ = 678698819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687027427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77118 + ... + 85564.

It is an arithmetic number, because the mean of its divisors is an integer number (92518272).

Almost surely, 2^687087427 is an apocalyptic number.

687087427 is a deficient number, since it is larger than the sum of its proper divisors (53058749).

687087427 is a wasteful number, since it uses less digits than its factorization.

687087427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14717.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 687087427 is about 26212.3525651552. The cubic root of 687087427 is about 882.4104998488.

The spelling of 687087427 in words is "six hundred eighty-seven million, eighty-seven thousand, four hundred twenty-seven".