687316671 has 10 divisors (see below), whose sum is σ = 1026732432. Its totient is φ = 458211060.

The previous prime is 687316657. The next prime is 687316691. The reversal of 687316671 is 176613786.

It is not a de Polignac number, because 687316671 - 2⁵ = 687316639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687316691) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4242615 + ... + 4242776.

Almost surely, 2^687316671 is an apocalyptic number.

687316671 is a deficient number, since it is larger than the sum of its proper divisors (339415761).

687316671 is an equidigital number, since it uses as much as digits as its factorization.

687316671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8485403 (or 8485394 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 687316671 is about 26216.7250243046. The cubic root of 687316671 is about 882.5086265264.

The spelling of 687316671 in words is "six hundred eighty-seven million, three hundred sixteen thousand, six hundred seventy-one".