687881567 has 8 divisors (see below), whose sum is σ = 735957360. Its totient is φ = 640992960.

The previous prime is 687881561. The next prime is 687881587. The reversal of 687881567 is 765188786.

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 687881567 - 2²⁴ = 671104351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687881561) 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, 295598 + ... + 297915.

It is an arithmetic number, because the mean of its divisors is an integer number (91994670).

Almost surely, 2^687881567 is an apocalyptic number.

687881567 is a deficient number, since it is larger than the sum of its proper divisors (48075793).

687881567 is a wasteful number, since it uses less digits than its factorization.

687881567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593593.

The product of its digits is 4515840, while the sum is 56.

The square root of 687881567 is about 26227.4963921454. The cubic root of 687881567 is about 882.7503341697.

The spelling of 687881567 in words is "six hundred eighty-seven million, eight hundred eighty-one thousand, five hundred sixty-seven".